AU2014276831A1 - Use of nitrogen compounds quaternised with alkylene oxide and hydrocarbyl-substituted polycarboxylic acid as additives in fuels and lubricants - Google Patents

Abstract

The invention relates to the use of quaternised nitrogen compounds as a fuel and lubricant additive or kerosene additive, such as in particular as a detergent additive, for decreasing or preventing deposits in the injection systems of direct-injection diesel engines, in particular in common rail injection systems, for decreasing the fuel consumption of direct-injection diesel engines, in particular of diesel engines having common rail injection systems, and for minimising the power loss in direct-injection diesel engines, in particular in diesel engines having common rail injection systems; the invention further relates to the use as an additive for petrol, in particular for operation of DISI engines.

Description

Use of nitrogen compounds quatemised with alkylene oxide and hydrocarbyl substituted polycarboxylic acid as additives in fuels and lubricants The present invention relates to the use of nitrogen compounds quaternized in a 5 specific manner as a fuel additive and lubricant additive or kerosene additive, such as, more particularly, as a detergent additive; for reducing the level of or preventing deposits in the injection systems of direct injection diesel engines, especially in common rail injection systems, for reducing the fuel consumption of direct injection diesel engines, especially of diesel engines with common rail injection systems, and for 10 minimizing power loss in direct injection diesel engines, especially in diesel engines with common rail injection systems; and as an additive for gasoline fuels, especially for operation of DISI engines. State of the art: 15 In direct injection diesel engines, the fuel is injected and distributed ultrafinely (nebulized) by a multihole injection nozzle which reaches directly into the combustion chamber of the engine, instead of being introduced into a prechamber or swirl chamber as in the case of the conventional (chamber) diesel engine. The advantage of direct 20 injection diesel engines lies in their high performance for diesel engines and nevertheless low fuel consumption. Moreover, these engines achieve a very high torque even at low speeds. At present, essentially three methods are being used for injection of the fuel directly 25 into the combustion chamber of the diesel engine: the conventional distributor injection pump, the pump-nozzle system (unit-injector system or unit-pump system), and the common rail system. In the common rail system, the diesel fuel is conveyed by a pump with pressures up to 30 2000 bar into a high-pressure line, the common rail. Proceeding from the common rail, branch lines run to the different injectors which inject the fuel directly into the combustion chamber. The full pressure is always applied to the common rail, which enables multiple injection or a specific injection form. In the other injection systems, in contrast, only a smaller variation in the injection is possible. Injection in the common 35 rail is divided essentially into three groups: (1.) pre-injection, by which essentially softer M/54171-PCT 2 combustion is achieved, such that harsh combustion noises ("nailing") are reduced and the engine seems to run quietly; (2.) main injection, which is responsible especially for a good torque profile; and (3.) post-injection, which especially ensures a low NOx value. In this post-injection, the fuel is generally not combusted, but instead vaporized by 5 residual heat in the cylinder. The exhaust gas/fuel mixture formed is transported to the exhaust gas system, where the fuel, in the presence of suitable catalysts, acts as a reducing agent for the nitrogen oxides NOx. The variable, cylinder-individual injection in the common rail injection system can 10 positively influence the pollutant emission of the engine, for example the emission of nitrogen oxides (NOx), carbon monoxide (CO) and especially of particulates (soot). This makes it possible, for example, for engines equipped with common rail injection systems to meet the Euro 4 standard theoretically even without additional particulate filters. 15 In modern common rail diesel engines, under particular conditions, for example when biodiesel-containing fuels or fuels with metal impurities such as zinc compounds, copper compounds, lead compounds and other metal compounds are used, deposits can form on the injector orifices, which adversely affect the injection performance of the 20 fuel and hence impair the performance of the engine, i.e. especially reduce the power, but in some cases also worsen the combustion. The formation of deposits is enhanced further by further developments in the injector construction, especially by the change in the geometry of the nozzles (narrower, conical orifices with rounded outlet). For lasting optimal functioning of engine and injectors, such deposits in the nozzle orifices must be 25 prevented or reduced by suitable fuel additives. In the injection systems of modern diesel engines, deposits cause significant performance problems. It is common knowledge that such deposits in the spray channels can lead to a decrease in the fuel flow and hence to power loss. Deposits at 30 the injector tip, in contrast, impair the optimal formation of fuel spray mist and, as a result, cause worsened combustion and associated higher emissions and increased fuel consumption. In contrast to these conventional "external" deposition phenomena, "internal" deposits (referred to collectively as internal diesel injector deposits (IDID)) in particular parts of the injectors, such as at the nozzle needle, at the control piston, at 35 the valve piston, at the valve seat, in the control unit and in the guides of these M/54171-PCT 3 components, also increasingly cause performance problems. Conventional additives exhibit inadequate action against these IDIDs. US 4,248,719 describes quaternized ammonium salts which are prepared by reacting 5 an alkenylsuccinimide with a monocarboxylic ester and find use as dispersants in lubricant oils for prevention of sludge formation. More particularly, for example, the reaction of polyisobutylsuccinic anhydride (PIBSA) with N,N-dimethylaminopropylamine (DMAPA) and quaternization with methyl salicylate is described. However, use in fuels, more particularly diesel fuels, is not proposed therein. The use of PIBSA with low 10 bismaleation levels of < 20% is not described therein. US 4,171,959 describes quaternized ammonium salts of hydrocarbyl-substituted succinimides, which are suitable as detergent additives for gasoline fuel compositions. Quaternization is preferably accomplished using alkyl halides. Also mentioned are 15 organic C2-C 8 -hydrocarbyl carboxylates and sulfonates. Consequently, the quaternized ammonium salts provided according to the teaching therein have, as a counterion, either a halide or a C 2

-C

8 -hydrocarbyl carboxylate or a C2-C8-hydrocarbyl sulfonate group. The use of PIBSA with low bismaleation levels of < 20% is likewise not described therein. 20 EP-A-2 033 945 discloses cold flow improvers which are prepared by quaternizing specific tertiary monoamines bearing at least one C8-C 4 o-alkyl radical with a C-C 4 -alkyl ester of specific carboxylic acids. Examples of such carboxylic esters are dimethyl oxalate, dimethyl maleate, dimethyl phthalate and dimethyl fumarate. Uses other than 25 that for improvement of the CFPP value of middle distillates are not demonstrated in EP-A-2 033 945. WO 2006/135881 describes quaternized ammonium salts prepared by condensation of a hydrocarbyl-substituted acylating agent and of an oxygen or nitrogen atom-containing 30 compound with a tertiary amino group, and subsequent quaternization by means of hydrocarbyl epoxide in combination with stoichiometric amounts of an acid such as, more particularly, acetic acid. Further quaternizing agents claimed in WO 2006/135881 are dialkyl sulfates, benzyl halides and hydrocarbyl-substituted carbonates, and dimethyl sulfate, benzyl chloride and dimethyl carbonate have been studied 35 experimentally. M/54171 -PCT 4 The quaternizing agents used with preference in WO 2006/135881, however, have serious disadvantages such as: toxicity or carcinogenicity (for example in the case of dimethyl sulfate and benzyl halides), no residue-free combustion (for example in the 5 case of dimethyl sulfate and alkyl halides), and inadequate reactivity which leads to incomplete quaternization or uneconomic reaction conditions (long reaction times, high reaction temperatures, excess of quaternizing agent; for example in the case of dimethyl carbonate). 10 EP-A-2 033 945 describes the preparation of halogen- and sulfur-free quaternary ammonium salts of organic carboxylic acids (for example oxalic acid, phthalic acid, salicylic acid, malonic acid and maleic acid, and the alkyl esters thereof) and the use thereof for improvement of the CFPP value of diesel fuels. 15 Quaternary ammonium salts of alpha-hydroxycarboxylic acids are proposed in EP-A-1 254 889 as cleaning agents for electronic components. In addition, Japanese patent application, application number 61-012197, describes the use of quaternary ammonium salts of organic carboxylic acids as surfactants or raw 20 materials for medicaments or cosmetics. It was therefore an object of the present invention to provide further fuel additives which prevent deposits in the injector tip and internal injector deposits in the course of operation of common rail diesel engines. 25 Brief description of the invention: It has now been found that, surprisingly, the above object is achieved by providing quaternized nitrogen compounds, for example hydrocarbylamine compounds, and fuel 30 and lubricant compositions additized therewith. Surprisingly, the inventive additives, as illustrated more particularly by the appended use examples, are surprisingly effective in common rail diesel engines and are notable for their particular suitability as an additive for reducing power loss resulting from 35 external deposits and cold start problems resulting from internal deposits. M/54171-PCT Description of figures: Figure 1 shows the running of a one-hour engine test cycle according to CEC F-098 5 08. Figure 2A to D shows photographs of injectors of a DISI gasoline engine operated with fuel either in unadditized form (A) or additized with various additives of the invention (B, C, D). 10 Detailed description of the invention: Al) Specific embodiments 15 The present invention relates especially to the following specific embodiments: 1. A fuel composition or lubricant composition comprising, in a majority of a customary fuel or lubricant, a proportion, especially an effective amount, of at least one reaction product comprising a quaternized nitrogen compound, or a fraction thereof which comprises a quaternized nitrogen compound and is 20 obtained from the reaction product by purification, said reaction product being obtainable by reacting a quaternizable nitrogen compound, for example a quaternizable alkylamine comprising at least one quaternizable, especially tertiary, amino group, with a quaternizing agent which converts the at least one quaternizable, 25 especially tertiary, amino group to a quaternary ammonium group, the quaternizing agent being a hydrocarbyl epoxide in combination with a free hydrocarbyl-substituted polycarboxylic acid. 2. The fuel composition or lubricant composition according to embodiment 1, 30 wherein the quaternizable nitrogen compound is selected from a) at least one alkylamine comprising at least one compound of the following general formula 3 RaRbRcN (3) 35 in which M/54171-PCT 6 at least one of the Ra, Rb and R, radicals, for example one or two, is a straight chain or branched, saturated or unsaturated C8-C 40 -hydrocarbyl radical (especially straight-chain or branched C8-C 4 o-alkyl) and the other radicals are identical or different, straight-chain or branched, saturated or unsaturated CrC-6 5 hydrocarbyl radicals (especially 0 1

-C

6 -alkyl); b) at least one polyalkene-substituted amine comprising at least one quaternizable, especially tertiary, amino group; c) at least one polyether-substituted amine comprising at least one 10 quaternizable, especially tertiary, amino group; and d) at least one reaction product of a hydrocarbyl-substituted acylating agent and a compound comprising a nitrogen or oxygen atom and additionally comprising at least one quaternizable, especially tertiary, amino group; and e) mixtures thereof; 15 2a. The fuel composition or lubricant composition according to embodiment 1, wherein the quaternizable nitrogen compound is, for example, an alkylamine 20 comprising at least one compound of the following general formula 3 RaRbRcN (3) in which all the Ra, Rb and R, radicals are identical or different, straight-chain or 25 branched, saturated or unsaturated C8-C 4 o-hydrocarbyl radicals, especially straight-chain or branched C8 - C 4 o-alkyl radicals. 3. The fuel composition or lubricant composition according to either of embodiments 1 and 2, wherein the quaternizing agent comprises an epoxide of the general 30 formula 4 d (4) Rd Rd where M/54171-PCT 7 the Rd radicals present therein are the same or different and are each H or a hydrocarbyl radical, the hydrocarbyl radical being an aliphatic or aromatic radical having at least 1 to 10 carbon atoms. 5 4. The fuel composition or lubricant composition according to any of embodiments 1 to 3, wherein the free acid of the quaternizing agent is a hydrocarbyl-substituted

C

3

-C

2 8-dicarboxylic acid. 5. The fuel composition or lubricant composition according to any of embodiments 1 10 to 4, wherein the hydrocarbyl substituent of the carboxylic acid is a polyalkylene radical having a degree of polymerization of 2 to 100, or 3 to 50 or 4 to 25. 6. The fuel composition or lubricant composition according to any of the preceding embodiments, wherein the quaternizable tertiary amine is a compound of the 15 formula 3 in which at least two of the Ra, Rb and Re radicals are the same or different and are each a straight-chain or branched C 10

-C

20 -alkyl radical and the other radical is C 1

-C

4 -alkyl. 7. The fuel composition or lubricant composition according to any of the preceding 20 embodiments, wherein the quaternizing agent is selected from lower alkylene oxides in combination with a hydrocarbyl-substituted polycarboxylic acid. 8. The fuel composition or lubricant composition according to any of the preceding embodiments, selected from diesel fuels, biodiesel fuels, gasoline fuels, and 25 alkanol-containing gasoline fuels, such as bioethanol-containing fuels, especially diesel fuels. 9. A quaternized nitrogen compound as defined in any of embodiments 1 to 7. 30 10. A process for preparing a quaternized nitrogen compound according to embodiment 9, comprising the reaction of a quaternizable alkylamine comprising at least one quaternizable tertiary amino group with a quaternizing agent which converts the at least one tertiary amino group to a quaternary ammonium group, M/54171-PCT the quaternizing agent being a hydrocarbyl epoxide in combination with a hydrocarbyl-substituted polycarboxylic acid. 11. The use of a quaternized nitrogen compound according to embodiment 9 or 5 prepared according to embodiment 10 as a fuel additive or lubricant additive. 12. The use according to embodiment 11 as an additive for reducing the fuel consumption of direct injection diesel engines, especially of diesel engines with common rail injection systems, and/or for minimizing power loss in direct 10 injection diesel engines, especially in diesel engines with common rail injection systems (for example, determined in a DW10 test based on CEC F-098-08, as described in detail below in the experimental section). 13. The use according to embodiment 11 as a gasoline fuel additive for reducing the 15 level of deposits in the intake system of a gasoline engine, such as, more particularly, DISI and PFI (port fuel injector) engines. 14. The use according to embodiment 10 as a diesel fuel additive for reducing the level of and/or preventing deposits in the injection systems (for example 20 determined in an XUD 9 test according to CEC-F-23-1-01), such as, more particularly, the internal diesel injector deposits (IDID) and/or valve sticking in direct injection diesel engines, especially in common rail injection systems (for example determined in an IDID test procedure, as described in detail below in the experimental section). 25 15. An additive concentrate comprising, in combination with further diesel fuel additives or gasoline fuel additives or lubricant additives, at least one quaternized nitrogen compound as defined in embodiment 9 or prepared according to embodiment 10. 30 Test methods suitable in each case for testing the above-designated applications are known to those skilled in the art, or are described in the experimental section which follows, to which general reference is hereby explicitly made. 35 A2) General definitions M/54171-PCT In the absence of statements to the contrary, the following general conditions apply: "Quaternizable" nitrogen groups or amino groups comprise especially primary, secondary and, in particular, tertiary amino groups. 5 "Hydrocarbyl" should be interpreted broadly and comprises both long-chain and short chain, straight-chain and branched hydrocarbyl radicals having 1 to 50 carbon atoms, which may optionally additionally comprise heteroatoms, for example 0, N, NH, S, in the chain thereof. A specific group of hydrocarbyl radicals comprises both long-chain 10 and short-chain, straight-chain or branched alkyl radicals having 1 to 1000, 3 to 500 4 to 400 carbon atoms. "Long-chain" or "high molecular weight" hydrocarbyl radicals are straight-chain or branched hydrocarbyl radicals and have 7 to 50 or 8 to 50 or 8 to 40 or 10 to 20 carbon 15 atoms, which may optionally additionally comprise heteroatoms, for example 0, N, NH, S, in the chain thereof. In addition, the radicals may be mono- or polyunsaturated and have one or more noncumulated, for example 1 to 5, such as 1, 2 or 3, C-C double bonds or C-C triple bonds, especially 1, 2 or 3 double bonds. They may be of natural or synthetic origin. 20 They may also have a number-average molecular weight (Mn) of 85 to 20 000, for example 113 to 10 000, or 200 to 10 000 or 350 to 5000, for example 350 to 3000, 500 to 2500, 700 to 2500, or 800 to 1500. In that case, they are more particularly formed essentially from C2-6, especially C24, monomer units such as ethylene, propylene, n- or 25 isobutylene or mixtures thereof, where the different monomers may be copolymerized in random distribution or as blocks. Such long-chain hydrocarbyl radicals are also referred to as polyalkylene radicals or poly-C2.6- or poly-C24-alkylene radicals. Suitable long-chain hydrocarbyl radicals and the preparation thereof are also described, for example, in WO 2006/135881 and the literature cited therein. 30 Examples of particularly useful polyalkylene radicals are polyisobutenyl radicals derived from what are called "high-reactivity" polyisobutenes which feature a high content of terminal double bonds. Terminal double bonds are alpha-olefinic double bonds of the type 35 M/54171-PCT 10 Polymer which are also referred to collectively as vinylidene double bonds. Suitable high reactivity polyisobutenes are, for example, polyisobutenes which have a proportion of vinylidene double bonds of greater than 70 mol%, especially greater than 80 mol% or 5 greater than 85 mol%. Preference is given especially to polyisobutenes which have homogeneous polymer skeletons. Homogeneous polymer skeletons are possessed especially by those polyisobutenes formed from isobutene units to an extent of at least 85% by weight, preferably to an extent of at least 90% by weight and more preferably to an extent of at least 95% by weight. Such high-reactivity polyisobutenes preferably 10 have a number-average molecular weight within the abovementioned range. In addition, the high-reactivity polyisobutenes may have a polydispersity in the range from 1.05 to 7, especially of about 1.1 to 2.5, for example of less than 1.9 or less than 1.5. Polydispersity is understood to mean the quotient of weight-average molecular weight Mw divided by the number-average molecular weight Mn. 15 Particularly suitable high-reactivity polyisobutenes are, for example, the Glissopal brands from BASF SE, especially Glissopal@ 1000 (Mn = 1000), Glissopal@ V 33 (Mn = 550) and Glissopal@ 2300 (Mn = 2300), and mixtures thereof. Other number-average molecular weights can be established in a manner known in principle by mixing 20 polyisobutenes of different number-average molecular weights or by extractive enrichment of polyisobutenes of particular molecular weight ranges. A specific group of long-chain hydrocarbyl radicals comprises straight-chain or branched alkyl radicals ("long-chain alkyl radicals") having 8 to 50, for example 8 to 40 25 or 8 to 30 or 10 to 20, carbon atoms. A further group of specific long-chain hydrocarbyl radicals comprises polyalkylene radicals which are formed essentially from C2-6, especially C24, monomer units, such as ethylene, propylene, n- or isobutylene or mixtures thereof and have a degree of 30 polymerization of 2 to 100, or 3 to 50 or 4 to 25. "Short-chain hydrocarbyl" or "low molecular weight hydrocarbyl" is especially straight chain or branched alkyl or alkenyl, optionally interrupted by one or more, for example 2, M/54171-PCT -1 -1 3 or 4, heteroatom groups such as -0- or -NH-, or optionally mono- or polysubstituted, for example di-, tri- or tetrasubstituted. "Hydrocarbylene" represents straight-chain or singly or multiply branched bridge 5 groups having I to 10 carbon atoms, optionally interrupted by one or more, for example 2, 3 or 4, heteroatom groups such as -0- or -NH-, or optionally mono- or polysubstituted, for example di-, tri- or tetrasubstituted. "Hydroxyalkyl" represents, in particular, the mono- or polyhydroxylated, for example the 10 monohydroxylated, analogs of the above alkyl radicals, for example the linear hydroxyalkyl groups, for example those having a primary (terminal) hydroxyl group, such as hydroxymethyl, 2-hydroxyethyl, 3-hydroxypropyl, 4-hydroxybutyl, or those having nonterminal hydroxyl groups, such as 1-hydroxyethyl, 1- or 2-hydroxypropyl, 1 or 2-hydroxybutyl or 1-, 2- or 3-hydroxybutyl. 15 "Alkyl" or "lower alkyl" represents especially saturated, straight-chain or branched hydrocarbon radicals having I to 4, 1 to 5, 1 to 6, or 1 to 7, carbon atoms, for example methyl, ethyl, n-propyl, 1-methylethyl, n-butyl, 1-methylpropyl, 2-methylpropyl, 1,1 dimethylethyl, n-pentyl, 1-methylbutyl, 2-methylbutyl, 3-methylbutyl, 2,2-dimethylpropyl, 20 1-ethylpropyl, n-hexyl, 1,1-dimethylpropyl, 1,2-dimethylpropyl, 1-methylpentyl, 2 methylpentyl, 3-methylpentyl, 4-methylpentyl, 1,1-dimethylbutyl, 1,2-dimethylbutyl, 1,3 dimethylbutyl, 2,2-dimethylbutyl, 2,3-dimethylbutyl, 3,3-dimethylbutyl, I-ethylbutyl, 2 ethylbutyl, 1,1,2-trimethylpropyl, 1,2,2-trimethylpropyl, 1-ethyl-1 -methylpropyl and 1 ethyl-2-methylpropyl; and also n-heptyl, and the singly or multiply branched analogs 25 thereof. "Long-chain alkyl" represents, for example, saturated straight-chain or branched hydrocarbyl radicals having 8 to 50, for example 8 to 40 or 8 to 30 or 10 to 20, carbon atoms, such as octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, 30 hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, hencosyl, docosyl, tricosyl, tetracosyl, pentacosyl, hexacosyl, heptacosyl, octacosyl, nonacosyl, squalyl, constitutional isomers, especially singly or multiply branched isomers and higher homologs thereof. M/54171-PCT "Hydroxyalkyl" represents, in particular, the mono- or polyhydroxylated, for example the monohydroxylated, analogs of the above alkyl radicals, for example the linear hydroxyalkyl groups, for example those having a primary (terminal) hydroxyl group, such as hydroxymethyl, 2-hydroxyethyl, 3-hydroxypropyl, 4-hydroxybutyl, or those 5 having nonterminal hydroxyl groups, such as 1-hydroxyethyl, 1- or 2-hydroxypropyl, 1 or 2-hydroxybutyl or 1-, 2- or 3-hydroxybutyl. "Alkenyl" represents mono- or polyunsaturated, especially monounsaturated, straight chain or branched hydrocarbyl radicals having 2 to 4, 2 to 6, or 2 to 7 carbon atoms 10 and one double bond in any position, e.g. C2-C 6 -alkenyl such as ethenyl, 1-propenyl, 2 propenyl, 1-methylethenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-methyl-1-propenyl, 2 methyl-1-propenyl, 1-methyl-2-propenyl, 2-methyl-2-propenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, 1-methyl-1 -butenyl, 2-methyl-1-butenyl, 3-methyl-1 -butenyl, 1 methyl-2-butenyl, 2-methyl-2-butenyl, 3-methyl-2-butenyl, 1-methyl-3-butenyl, 2-methyl 15 3-butenyl, 3-methyl-3-butenyl, 1,1-dimethyl-2-propenyl, 1,2-dimethyl-1-propenyl, 1,2 dimethyl-2-propenyl, 1-ethyl-1 -propenyl, 1-ethyl-2-propenyl, 1-hexenyl, 2-hexenyl, 3 hexenyl, 4-hexenyl, 5-hexenyl, 1-methyl-1-pentenyl, 2-methyl-1 -pentenyl, 3-methyl-1-pentenyl, 4-methyl-1 -pentenyl, 1-methyl-2-pentenyl, 2-methyl-2-pentenyl, 3-methyl-2-pentenyl, 4-methyl-2-pentenyl, 20 1-methyl-3-pentenyl, 2-methyl-3-pentenyl, 3-methyl-3-pentenyl, 4-methyl-3-pentenyl, 1-methyl-4-pentenyl, 2-methyl-4-pentenyl, 3-methyl-4-pentenyl, 4-methyl-4-pentenyl, 1,1-dimethyl-2-butenyl, 1,1 -dimethyl-3-butenyl, 1,2-dimethyl-1 -butenyl, 1,2-dimethyl-2-butenyl, 1,2-dimethyl-3-butenyl, 1,3-dimethyl-1 -butenyl, 1,3-dimethyl-2-butenyl, 1,3-dimethyl-3-butenyl, 2,2-dimethyl-3-butenyl, 25 2,3-dimethyl-1 -butenyl, 2,3-dimethyl-2-butenyl, 2,3-dimethyl-3-butenyl, 3,3-dimethyl-1 -butenyl, 3,3-dimethyl-2-butenyl, I -ethyl-1 -butenyl, 1-ethyl-2-butenyl, 1 -ethyl-3-butenyl, 2-ethyl-1-butenyl, 2-ethyl-2-butenyl, 2-ethyl-3-butenyl, 1,1,2-trimethyl-2-propenyl, 1-ethyl-I -methyl-2-propenyl, 1 -ethyl-2-methyl-1 -propenyl and 1-ethyl-2-methyl-2-propenyl. 30 "Hydroxyalkenyl" represents, in particular, the mono- or polyhydroxylated, especially monohydroxylated, analogs of the above alkenyl radicals. "Aminoalkyl" and "aminoalkenyl" represent, in particular, the mono- or polyaminated, 35 especially monoaminated, analogs of the above alkyl and alkenyl radicals respectively, M/54171-PCT or analogs of the above hydroxyalkyl where the OH group has been replaced by an amino group. "Alkylene" represents straight-chain or singly or multiply branched hydrocarbyl bridging 5 groups having 1 to 10 carbon atoms, for example O 1

-C

7 -alkylene groups selected from

-CH

2 -, -(CH 2

)

2 -, -(CH 2

)

3

-,-(CH

2

)

4 -, -(CH 2

)

2

-CH(CH

3 )-, -CH 2

-CH(CH

3

)-CH

2 -, (CH 2

)

4 -, (CH 2

)

5 -, -(CH 2

)

6 , -(CH 2

)

7 -, -CH(CH 3

)-CH

2

-CH

2

-CH(CH

3 )- or -CH(CH 3

)-CH

2

-CH

2

-CH

2 CH(CH 3 )-, or CeC4-alkylene groups selected from -CH 2 -, -(CH 2

)

2 -, -(CH 2

)

3 -, -(CH 2

)

4 -, (CH 2

)

2

-CH(CH

3 )-, -CH 2

-CH(CH

3

)-CH

2 10 or C2-C6-alkylene groups, for example

-CH

2

-CH(CH

3 )-, -CH(CH 3

)-CH

2 -, -CH(CH 3

)-CH(CH

3 )-, -C(CH 3

)

2

-CH

2 -, -CH 2

-C(CH

3

)

2 -,

-C(CH

3

)

2

-CH(CH

3 )-, -CH(CH 3

)-C(CH

3

)

2 -, -CH 2 -CH(Et)-, -CH(CH 2

CH

3

)-CH

2 -,

-CH(CH

2

CH

3

)-CH(CH

2

CH

3 )-, -C(CH 2

CH

3

)

2

-CH

2 -, -CH 2

-C(CH

2

CH

3

)

2 -,

-CH

2 -CH(n-propyl)-, -CH(n-propyl)-CH 2 -, -CH(n-propyl)-CH(CH 3 )-, -CH 2 -CH(n-butyl)-, 15 -CH(n-butyl)-CH 2 -, -CH(CH 3

)-CH(CH

2

CH

3 )-, -CH(CH 3 )-CH(n-propyl)-, -CH(CH 2

CH

3

)

CH(CH

3 )-, -CH(CH 3

)-CH(CH

2

CH

3 )-, or C2-C 4 -alkylene groups, for example selected from -(CH 2

)

2 -, -CH 2

-CH(CH

3 )-, -CH(CH 3

)-CH

2 -, -CH(CH 3

)-CH(CH

3 )-, -C(CH 3

)

2

-CH

2 -, CH 2

-C(CH

3

)

2 -, -CH 2

-CH(CH

2

CH

3 )-, -CH(CH 2

CH

3

)-CH

2 -. 20 "Oxyalkylene radicals" correspond to the definition of the above straight-chain or singly or multiply branched alkylene radicals having 2 to 10 carbon atoms, where the carbon chain is interrupted once or more than once, especially once, by an oxygen heteroatom. Nonlimiting examples include: -CH 2

-O-CH

2 -, -(CH 2

)

2

-O-(CH

2

)

2 -, -(CH 2

)

3

-O

(CH

2

)

3 -, or -CH 2 -0-(CH 2

)

2 -, -(CH 2

)

2

-O-(CH

2

)

3 -, -CH 2

-O-(CH

2

)

3 25 "Aminoalkylene" corresponds to the definition of the above straight-chain or singly or multiply branched alkylene radicals having 2 to 10 carbon atoms, where the carbon chain is interrupted once or more than once, especially once, by a nitrogen group (especially -NH group). Nonlimiting examples include: -CH 2

-NH-CH

2 -, -(CH 2

)

2

-NH

30 (CH 2

)

2 -, -(CH 2

)

3

-NH-(CH

2

)

3 -, or -CH 2

-NH-(CH

2

)

2 -, -(CH 2

)

2

-NH-(CH

2

)

3 -, -CH 2

-NH-(CH

2

)

3 . "Alkenylene" represents the mono- or polyunsaturated, especially monounsaturated, analogs of the above alkylene groups having 2 to 10 carbon atoms, especially C2-C7 alkenylenes or C2-C4-alkenylene, such as -CH=CH-, -CH=CH-CH 2 -, -CH 2 -CH=CH-, M/54171-PCT 14

-CH=CH-CH

2

-CH

2 -, -CH 2

-CH=CH-CH

2 -, -CH 2

-CH

2 -CH=CH-, -CH(CH 3 )-CH=CH-, -CH 2 C(CH 3 )=CH-. "Cycloalkyl" represents carbocyclic radicals having 3 to 20 carbon atoms, for example 5 C 3

-C

1 2-cycloalkyl such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, cycloundecyl and cyclododecyl; preference is given to cyclopentyl, cyclohexyl, cycloheptyl, and also cyclopropylmethyl, cyclopropylethyl, cyclobutylmethyl, cyclobutylethyl, cyclopentylmethyl, cyclopentylethyl, cyclohexylmethyl, or C3-C7-cycloalkyl such as cyclopropyl, cyclobutyl, cyclopentyl, 10 cyclohexyl, cycloheptyl, cyclopropylmethyl, cyclopropylethyl, cyclobutylmethyl, cyclopentylethyl, cyclohexylmethyl, where the bond to the rest of the molecule may be via any suitable carbon atom. "Cycloalkenyl" or "mono- or polyunsaturated cycloalkyl" represents, in particular, 15 monocyclic, mono- or polyunsaturated hydrocarbyl groups having 5 to 8, preferably up to 6, carbon ring members, for example monounsaturated cyclopenten-1-yl, cyclopenten-3-yl, cyclohexen-1-yl, cyclohexen-3-yl and cyclohexen-4-yl radicals. "Aryl" represents mono- or polycyclic, preferably mono- or bicyclic, optionally 20 substituted aromatic radicals having 6 to 20, for example 6 to 10, ring carbon atoms, for example phenyl, biphenyl, naphthyl such as 1- or 2-naphthyl, tetrahydronaphthyl, fluorenyl, indenyl and phenanthrenyl. These aryl radicals may optionally bear 1, 2, 3, 4, 5 or 6 identical or different substituents. 25 "Alkylaryl" represents the alkyl-substituted analogs of the above aryl radicals with mono- or polysubstitution, especially mono- or disubstitution, in any ring position, where aryl likewise has the definitions given above, for example Cl-C4-alkylphenyl, where the C-C 4 -alkyl radicals may be in any ring position. 30 "Substituents" for radicals specified herein are especially, unless stated otherwise, selected from keto groups, -COOH, -COO-alkyl, -OH, -SH, -CN, amino, -NO 2 , alkyl, or alkenyl groups. "Mn" represents the number-average molecular weight and is determined in a 35 conventional manner; more particularly, such figures relate to Mn values determined by M/54171-PCT 15 relative methods, such as gel permeation chromatography with THF as the eluent and polystyrene standards, or absolute methods, such as vapor phase osmometry using toluene as the solvent. 5 "Mw" represents the weight-average molecular weight and is determined in a conventional manner; more particularly, such figures relate to Mw values determined by relative methods, such as gel permeation chromatography with THF as the eluent and polystyrene standards, or absolute methods, such as light scattering. 10 The "degree of polymerization" usually refers to the numerical mean degree of polymerization (determination method: gel permeation chromatography with THF as the eluent and polystyrene standards; or GC-MS coupling). A3) Quatemizable nitrogen compounds 15 Quaternizable nitrogen compounds are especially: A3.1) Tertiary amines 20 Tertiary amines are especially compounds of the above formula (3) and are compounds known per se, as described, for example, in EP-A-2 033 945. The tertiary amine reactant (3) preferably bears a segment of the formula NRaRb where one of the radicals has an alkyl group having 8 to 40 carbon atoms and the other an 25 alkyl group having up to 40 and more preferably 8 to 40 carbon atoms. The R, radical is especially a short-chain Cr 1

C

6 -alkyl radical, such as a methyl, ethyl or propyl group. Ra and Rb may be straight-chain or branched, and/or may be the same or different. For example, Ra and Rb may be a straight-chain C 12

-C

24 -alkyl group. Alternatively, only one of the two radicals may be long-chain (for example having 8 to 40 carbon atoms), and 30 the other may be a methyl, ethyl or propyl group. Appropriately, the NRaRb segment is derived from a secondary amine, such as dioctadecylamine, dicocoamine, hydrogenated ditallowamine and methylbehenylamine. Amine mixtures as obtainable from natural materials are likewise suitable. One 35 example is a secondary hydrogenated tallowamine where the alkyl groups are derived M/54171-PCT from hydrogenated tallow fat, and contain about 4% by weight of C14, 31 % by weight of C16 and 59% by weight of C 1 8 -alkyl groups. Corresponding tertiary amines of the formula (3) are sold, for example, by Akzo Nobel under the Armeen@ M2HT or Armeen@ M2C name. 5 However, the tertiary amine adduct (3) may also be one where the Ra, Rb and R, radicals have identical or different long-chain alkyl radicals, especially straight-chain or branched alkyl groups having 8 to 40 carbon atoms. 10 However, the tertiary amine adduct (3) may also be one where the Ra, Rb and R, radicals have identical or different short-chain alkyl radicals, especially straight-chain or branched alkyl groups having 1 to 7 or especially 1 to 4 carbon atoms. Further nonlimiting examples of suitable amines are: 15 N,N-dimethyl-N-(2-ethylhexyl)amine, N,N-dimethyl-N-(2-propylheptyl)amine, dodecyl dimethylamine, hexadecyldimethylamine, oleyldimethylamine, stearyldimethylamine, heptadecyldimethylamine, cocoyldimethylamine, dicocoylmethylamine, tallowdimethylamine, ditallowmethylamine, tridodecylamine, trihexadecylamine, 20 trioctadecylamine, soyadimethylamine, tris(2-ethylhexyl)amine, and Alamine 336 (tri-n octylamine). Nonlimiting examples of short-chain tertiary amines are: trimethylamine, triethylamine, tri-n-propylamine, tri-n-butylamine, tri-n-pentylamine, tri-n-hexylamine, tri-n 25 heptylamine, ethyldimethylamine, dimethylethylamine, n-propyldimethylamine, isopropyldimethylamine, n-propyldiethylamine, isopropyldiethylamine, n butyldimethylamine, n-butyldiethylamine, n-butyldipropylamine. Short-chain triamines are also appropriate especially when the quaternizing agent (see 30 below) bears one or more alkyl radicals Rd having more than one carbon atom or one or more aromatic radicals Rd. A3.2) Quaternizable, polyether-substituted amine comprising at least one quaternizable, especially tertiary, amino group; 35 M/54171-PCT 171 Compounds of this kind are described, for example, in the applicant's W02013/064689, which is hereby explicitly incorporated by reference. Substituted amines of this kind especially have at least one, especially one, polyether 5 substituent having monomer units of the general formula Ic

-[-CH(R

3

)-CH(R

4 )-O-]- (Ic) in which 10 R 3 and R 4 are the same or different and are each H, alkyl, alkylaryl or aryl. The polyether-substituted amine may have a number-average molecular weight in the range from 500 to 5000, especially 800 to 3000 or 900 to 1500. 15 The quaternizable, polyether-substituted amines are especially nitrogen compounds of the general formula la-1 or lb-2

(R,)(R

2

)N-A-O[CH(R

3

)-CH(R

4 )-OAH (la-I) R-04CH(R 3

)~CH(R

4 )-O n- CH(R 3

)-CH(R

4

)-N(R

1

)(R

2 ) (b-2) 20 in which

R

1 and R 2 are the same or different and are each alkyl, alkenyl, hydroxyalkyl, hydroxyalkenyl, aminoalkyl or aminoalkenyl, or R 1 and R 2 together are alkylene, oxyalkylene or aminoalkylene; 25 R 3 and R 4 are the same or different and are each H, alkyl, alkylaryl or aryl;

R

6 is alkyl, alkenyl, optionally mono- or polyunsaturated cycloalkyl, aryl, in each case optionally substituted, for example by at least one hydroxyl radical or alkyl radical, or interrupted by at least one heteroatom; A is a straight-chain or branched alkylene radical optionally interrupted by one or more 30 heteroatoms such as N, 0 and S; and n is an integer value from 1 to 50. Particular mention should be made of those nitrogen compounds of the formulae la-1 and lb-2 in which M/54171-PCT 18

R

1 and R 2 are the same or different and are each Cr-C 6 -alkyl, hydroxy-Cr-C 6 -alkyl, hydroxy-Cr-C 6 -alkenyl, or amino-C-C 6 -alkyl, or R 1 and R 2 together form a C2-C6 alkylene, C2-C 6 -oxyalkylene or C2-C6-aminoalkylene radical;

R

3 and R 4 are the same or different and are each H, Cl-C 6 -alkyl or phenyl; 5 R 6 is C-C2o-alkyl, for example C10-C20-, C11-C20- or C 12

-C

2 0 -alkyl or aryl or alkylaryl, where alkyl is especially for CrC20-; A is a straight-chain or branched C2-C 6 -alkylene radical optionally interrupted by one or more heteroatoms such as N, 0 and S; and n is an integer value from 1 to 30. 10 Particular mention should additionally be made of reaction products of N,N dimethylethanolamine and propylene oxide, as described in Synthesis example 1 of WO 2013/064689. This reaction can also be performed without catalysis or with an amine (for example imidazole) as a catalyst, as described, for example, in M. lonescu, 15 Chemistry and Technology of Polyols for Polyurethanes, 2005, ISBN 978-85957-501-7. Nitrogen compounds of the general formula la-1 are preparable by alkoxylating an aminoalkanol of the general formula 11 20 (R1)(R 2 )N- A-OH (II) in which

R

1 , R 2 and A are each as defined above with an epoxide of the general formula Ill 0 25

(R

3 )HC CH(R 4 ) in which

R

3 and R 4 are each as defined above to obtain an alkoxylated amine of the formula 30

(R

1 )(R2)N-A-O[CH(R 3 )-CH(R 4 )-O H (la-1) in which R 1 to R 4 , A and n are each as defined above. Nitrogen compounds of the general formula la-2 are preparable by M/54171-PCT 19 by alkoxylating an alcohol of the general formula V

R

6 -OH (V) 5 in which

R

6 is as defined above with an epoxide of the general formula III 0

(R

3 )HC

CH(R

4 ) 10 in which

R

3 and R 4 are each as defined above to obtain a polyether of the formula Ib-1; R -O4CH(R 3

)-CH(R

4 )-O n- CH(R 3

)-CH(R

4 )OH (lb-1) 15 in which R 3 , R 4 and R 6 , A and n are each as defined above and b) then aminating the polyether of the formula lb-1 thus obtained with an amine of the general formula 20

NH(R

1

)(R

2 ) (VII) in which R 1 and R 2 are each as defined above to obtain an amine of the formula lb-2. 25 Starting compounds for preparation of the above polyether-substituted, quaternizable nitrogen compounds are thus: 1) alcohols, 30 for example of the general formula V

R

6 -OH (V) M/54171-PCT in which R 6 is alkyl, alkenyl, optionally mono- or polyunsaturated cycloalkyl, aryl, in each case optionally substituted, for example by at least one hydroxyl radical or alkyl radical, or interrupted by at least one heteroatom; 5 and 2) amino alkanols, for example of the general formula I 10

(R,)(R

2 )N-A-OH (II) in which 15 R 1 and R 2 are the same or different and are each alkyl, alkenyl, hydroxyalkyl, hydroxyalkenyl, aminoalkyl or aminoalkenyl, or R 1 and R 2 together are alkylene, oxyalkylene or aminoalkylene; and A is a straight-chain or branched alkylene or alkenylene radical optionally interrupted by one or more heteroatoms such as N, 0 and S. 20 A further suitable group of quaternizable amino alcohols that should be mentioned is that of compounds selected from hydroxyalkyl-substituted mono- or polyamines having at least one quaternizable, primary, secondary or tertiary amino group and at least one hydroxyl group which can be joined to a polyether radical. 25 The quaternizable nitrogen compound is especially selected from hydroxyalkyl substituted primary, secondary and especially tertiary monoamines, and hydroxyalkyl substituted primary, secondary and especially tertiary diamines. 30 Examples of suitable "hydroxyalkyl-substituted mono- or polyamines" are those which have been provided with at least one hydroxyalkyl substituent, for example 1, 2, 3, 4, 5 or 6 hydroxyalkyl substituents. Examples of "hydroxyalkyl-substituted monoamines" include: N 35 hydroxyalkylmonoamines, N,N-dihydroxyalkylmonoamines and N,N,N-trihydroxyalkyl M/54171-PCT 21 monoamines, where the hydroxyalkyl groups are the same or different and are also as defined above. Hydroxyalkyl here represents especially 2-hydroxyethyl, 3 hydroxypropyl or 4-hydroxybutyl. 5 Examples include the following "hydroxyalkyl-substituted polyamines" and especially "hydroxyalkyl-substituted diamines": (N-hydroxyalkyl)alkylenediamines, N, N dihydroxyalkyl-alkylenediamines, where the hydroxyalkyl groups are the same or different and are also as defined above. Hydroxyalkyl here represents especially 2 hydroxyethyl, 3-hydroxypropyl or 4-hydroxybutyl; alkylene here represents especially 10 ethylene, propylene or butylene. Particular mention should be made of the following quaternizable nitrogen compounds: NAME FORMULA Alcohols with primary and secondary amine ethanolamine

H

2 N OH 3-hydroxy-1 -propylamine

H

2 N OH H diethanolamine HO N OH diisopropanolamine HO0O H OH N-\ N-(2-hydroxyethyl)ethylenediamine

NH

2 HO Alcohols with tertiary amine M/54171-PCT 22 OH triethanolamine, (2,2',2"-nitrilotriethanol) N OH 1-(3-hydroxypropyl)imidazole N HO -OH tris(hydroxymethyl)amine N OH 3-dimethylamino-1 -propanol 3-diethylamino-1 -propanol H 2-dimethylamino-1 -ethanol N 4-diethylamino-1 -butanol HO N For preparation of the polyether-substituted quaternizable compounds (la-1 and lb-1), the procedure may be as follows: 5 al) Proceeding from amino alcohols of the formula II: The amino alcohols of the general formula II can be alkoxylated in a manner known in principle to obtain alkoxylated amines of the general formula la-1. 10 The performance of alkoxylation is known in principle to those skilled in the art. The person skilled in the art is likewise aware that the molecular weight distribution of the M/54171-PCT 23 alkoxylates can be influenced through the reaction conditions, especially the choice of catalyst. For the alkoxylation, C2-C16-alkylene oxides are used, for example ethylene oxide, 5 propylene oxide or butylene oxide. Preference is given to the 1,2-alkylene oxides in each case. The alkoxylation may be a base-catalyzed alkoxylation. For this purpose, the amino alcohols (II) can be admixed in a pressure reactor with alkali metal hydroxides, 10 preferably potassium hydroxide, or with alkali metal alkoxides, for example sodium methoxide. By means of reduced pressure (for example <100 mbar) and/or an increase in temperature (30 to 1500C), it is possible to draw off water still present in the mixture. Thereafter, the alcohol is present as the corresponding alkoxide. This is followed by inertization with inert gas (e.g. nitrogen) and stepwise addition of the alkylene oxide(s) 15 at temperatures of 60 to 1800C up to a pressure of max. 10 bar. At the end of the reaction, the catalyst can be neutralized by addition of acid (e.g. acetic acid or phosphoric acid) and can be filtered off if required. The basic catalyst can also be neutralized by addition of commercial magnesium silicates, which are subsequently filtered off. Optionally, the alkoxylation can also be performed in the presence of a 20 solvent. This may be, for example, toluene, xylene, dimethylformamide or ethylene carbonate. The alkoxylation of the amino alcohols can also be undertaken by means of other methods, for example by acid-catalyzed alkoxylation. In addition, it is possible to use, 25 for example, double hydroxide clays as described in DE 43 25 237 Al, or it is possible to use double metal cyanide catalysts (DMC catalysts). Suitable DMC catalysts are disclosed, for example, in DE 102 43 361 Al, especially paragraphs [0029] to [0041] and the literature cited therein. For example, it is possible to use catalysts of the Zn-Co type. For performance of the reaction, the amino alcohol can be admixed with the 30 catalyst, and the mixture can be dewatered as described above and reacted with the alkylene oxides as described. Typically not more than 1000 ppm of catalyst is used, based on the mixture, and the catalyst can remain in the product because of this small amount. The amount of catalyst may generally be less than 1000 ppm, for example 250 ppm or less. 35 M/54171-PCT 24 The alkoxylation can alternatively also be undertaken by reaction of the compounds (IV) and (V) with cyclic carbonates, for example ethylene carbonate. a2) Proceeding from alkanols of the formula V: 5 As described in the above paragraph al) for amino alcohols (II), it is analogously also possible to alkoxylate alkanols R 6 OH in a manner known in principle to polyethers (Ib 1). The polyethers thus obtained can subsequently be converted to the corresponding polyether amines (lb-2) by reductive amination with ammonia, primary amines or 10 secondary amines (VII) by customary methods, in continuous or batchwise processes using hydrogenation or amination catalysts customary therefor, for example those comprising catalytically active constituents based on the elements Ni, Co, Cu, Fe, Pd, Pt, Ru, Rh, Re, Al, Si, Ti, Zr, Nb, Mg, Zn, Ag, Au, Os, Ir, Cr, Mo, W or combinations of these elements with one another, in customary amounts. The conversion can be 15 performed without solvent or, in the case of high polyether viscosities, in the presence of a solvent, preferably in the presence of branched aliphatics, for example isododecane. The amine component (VII) is generally used here in excess, for example in a 2- to 100-fold excess, preferably a 10- to 80-fold excess. The reaction is conducted at pressures of 10 to 600 bar over a period of 10 minutes to 10 hours. After cooling, the 20 catalyst is removed by filtering, excess amine component (VII) is evaporated and the water of reaction is distilled off azeotropically or under a gentle nitrogen stream. Should the resulting polyether amine (lb-2) have primary or secondary amine functionalities (R 1 and/or R 2 is H), it can subsequently be converted to a polyether 25 amine having a tertiary amine function (R 1 and R 2 not H). The alkylation can be effected in a manner known in principle by reaction with alkylating agents. Any alkylating agents are suitable in principle, for example alkyl halides, alkylaryl halides, dialkyl sulfates, alkylene oxides, optionally in combination with acid; aliphatic or aromatic carboxylic esters, such as dialkyl carboxylates in particular; alkanoates; cyclic 30 nonaromatic or aromatic carboxylic esters; dialkyl carbonates; and mixtures thereof. The conversions to the tertiary polyether amine can also take place through reductive amination by reaction with a carbonyl compound, for example formaldehyde, in the presence of a reducing agent. Suitable reducing agents are formic acid or hydrogen in the presence of a suitable heterogeneous or homogeneous hydrogenation catalyst. 35 The reactions can be performed without solvent or in the presence of solvents. M/54171-PCT 25 Suitable solvents are, for example, H 2 0, alkanols such as methanol or ethanol, or 2 ethylhexanol, aromatic solvents such as toluene, xylene or solvent mixtures from the Solvesso series, or aliphatic solvents, especially mixtures of branched aliphatic solvents. The reactions are conducted at temperatures of 100C to 3000C at pressures 5 of 1 to 600 bar over a period of 10 minutes to 10 h. The reducing agent is used here at least stoichiometrically, preferably in excess, especially in a 2- to 10-fold excess. The reaction product thus formed (polyether amine lb-1 or lb-2) can theoretically be purified further, or the solvent can be removed. Usually, however, this is not absolutely 10 necessary, and so the reaction product can be transferred without further purification to the next synthesis step, the quaternization. A3.3) Polyalkene-substituted amines having at least one tertiary, quatemizable 15 nitrogen group Further suitable quaternizable nitrogen compounds are polyalkene-substituted amines having at least one tertiary nitrogen group. This group of compounds is likewise known and is described, for example, in WO 2008/060888 or US 2008/0113890 and the 20 further prior art cited therein, which is hereby explicitly incorporated by reference. Such polyalkene-substituted amines having at least one tertiary amino group are derivable from an olefin polymer and an amine such as ammonia, monoamines, polyamines or mixtures thereof. They can be prepared by a multitude of processes, for 25 example the following processes cited by way of example: A process for preparing a polyalkene-substituted amine comprises the reaction of a halogenated olefin polymer with an amine, as described in US Patents 3,275,554, 3,438,757, 3,454,555, 3,565,804, 3,755,433 and 3,822,289. 30 A further process for preparing a polyalkene-substituted amine comprises the reaction of a hydroformylated olefin with a polyamine and hydrogenation of the reaction product, as described in US 5,567,845 and 5,496,383. 35 A further process for preparing a polyalkene-substituted amine comprises the conversion of a polyalkene with the aid of a conventional epoxidizing reagent with or M/54171-PCT 26 without catalyst to the corresponding epoxide and the conversion of the epoxide to the polyalkene-substituted amine by reaction with ammonia or an amine under the conditions of reductive amination, as described in US 5,350,429. 5 A further process for preparing a polyalkene-substituted amine comprises the hydrogenation of a p-amino nitrile which has been prepared by reaction of an amine with a nitrile, as described in US 5,492,641. A further process for preparing a polyalkene-substituted amine comprises 10 hydroformylation of a polybutene or polyisobutylene with a catalyst, such as rhodium or cobalt, in the presence of CO and and hydrogen at elevated pressures and temperatures, as described in US 4,832,702. In one embodiment of the invention, the polyalkenes used for the preparation are 15 derived from olefin polymers. The olefin polymers may comprise homopolymers and copolymers of polymerizable olefin monomers having 2 to about 16 carbon atoms, 2 to about 6 carbon atoms or 2 to about 4 carbon atoms. Interpolymers are those in which two or more olefin monomers are interpolymerized by 20 known conventional methods, giving polyalkenes having units derived from each of the the two or more olefin monomers within their structure. Thus, "interpolymers" comprise copolymers, terpolymers and tetrapolymers. 25 "Polyalkenes", from which the polyalkene-substituted amines are derived, are conventionally frequently also referred to as "polyolefins". The olefin monomers from which the olefin polymers are derived are polymerizable olefin monomers having one or more ethylenically unsaturated groups (i.e. >C=C<). In 30 other words, they are monoolefinic monomers such as ethylene, propylene, 1-butene, isobutene (2-methyl-1-butene), 1-octene, or polyolefinic monomers (usually diolefinic monomers) such as 1,3-butadiene and isoprene. M/54171-PCT The olefin monomers are usually polymerizable terminal olefins, i.e. olefins having the

>C=CH

2 group in their structure. However, it is also possible to use polymerizable internal olefin monomers characterized by groups of the formula >C-C=C-C<. 5 Specific examples of terminal and internal olefin monomers which can be used to prepare the polyalkenes by conventional methods are: ethylene, propylene, the butenes (butylene), especially 1-butene, 2-butene and isobutylene, 1-pentene, 1 hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 2-pentene, propylene tetramer, diisobutylene, isobutylene trimer, 1,2-butadiene, 1,3-butadiene, 1,2-pentadiene, 1,3 10 pentadiene, 1,4-pentadiene, isoprene, 1,5-hexadiene, 2-methyl-5-propyl-1-hexene, 3 pentene, 4-octene and 3,3-dimethyl-1-pentene. In another embodiment, the olefin polymer is preparable by polymerization of a C4 refinery stream having a butene content of about 35 to about 75 percent by weight and 15 an isobutene content of about 30 to about 60 percent by weight in the presence of a Lewis acid catalyst such as aluminum trichloride or boron trifluoride. These polybutenes typically comprise predominantly (more than about 80% of all the repeat units) repeat isobutene units of the (-CH 2

-C(CH

3

)

2 -) type. 20 In a further embodiment, the polyalkene substituent of the polyalkene-substituted amine is derived from a polyisobutylene. In another embodiment, the amines which can be used to form the polyalkene substituted amine comprise ammonia, monoamines, polyamines or mixtures thereof, 25 including mixtures of various monoamines, mixtures of various polyamines and mixtures of monoamines and polyamines (the diamines). The amines comprise aliphatic, aromatic, heterocyclic and carbocyclic amines. Monoamines and polyamines are characterized by the presence in their structure of at least one HN< group. The amines may be aliphatic, cycloaliphatic, aromatic or heterocyclic. 30 The monoamines are generally substituted by a hydrocarbyl group having 1 to 50 carbon atoms. These hydrocarbyl groups may especially be aliphatic and free of acetylenically unsaturated groups and have 1 to about 30 carbon atoms. Particular mention should be made of saturated aliphatic hydrocarbyl radicals having 1 to 30 carbon atoms. 35 M/54171-PCT In a further embodiment, the monoamines may have the formula HNR 1

R

2 where R 1 is a hydrocarbyl group having up to 30 carbon atoms and R 2 is hydrogen or a hydrocarbyl group having up to about 30 carbon atoms. Examples of suitable monoamines are methylamine, ethylamine, diethylamine, 2-ethylhexylamine, di(2-ethylhexyl)amine, n 5 butylamine, di-n-butylamine, allylamine, isobutylamine, cocoamine, stearylamine, laurylamine, methyllaurylamines and oleylamine. Aromatic monoamines are those monoamines in which a carbon atom in the aromatic ring structure is bonded directly to the amine nitrogen atom. The aromatic ring will 10 usually be a monocyclic aromatic ring (i.e. derived from benzene), but may include fused aromatic rings, especially those derived from naphthalene. Examples of aromatic monoamines are aniline, di(para-methylphenyl)amine, naphthylamine, N-(n butyl)aniline. Examples of aliphatic-substituted, cycloaliphatic-substituted and heterocyclic-substituted aromatic monoamines are: para-dodecylaniline, cyclohexyl 15 substituted naphthylamine and thienyl-substituted aniline. Hydroxylamines are likewise suitable monoamines. Compounds of this kind are the hydroxyhydrocarbyl-substituted analogs of the aforementioned monoamines. 20 In one embodiment, the hydroxymonoamines of the formula HNR 3

R

4 where R 3 is a hydroxyl-substituted alkyl group having up to about 30 carbon atoms, and in one embodiment up to about 10 carbon atoms; and R 4 is a hydroxyl-substituted alkyl group having up to about 30 carbon atoms, hydrogen or a hydrocarbyl group having up to about 10 carbon atoms. Examples of hydroxyl-substituted monoamines include: 25 ethanolamine, di-3-propanolamine, 4-hydroxybutylamine, diethanolamine and N methyl-2-hydroxypropylamine. In another embodiment, the amine of the polyalkene-substituted amines may be a polyamine. The polyamine may be aliphatic, cycloaliphatic, heterocyclic or aromatic. 30 Examples of the polyamines include: alkylenepolyamines, hydroxyl group-comprising polyamines, aryl polyamines and heterocyclic polyamines. The alkylenepolyamines comprise those of the following formula: 35 HN(R 5 )-(alkylene-N(R))a-(R 5 ) M/54171-PCT in which n is in the range from 1 to about 10 and, for example, in the range from 2 to about 7, or from 2 to about 5, and the "alkylene" group has 1 to about 10 carbon atoms, for example 2 to about 6, or 2 to about 4 carbon atoms; 5 the R- radicals are each independently hydrogen, an aliphatic group, a hydroxyl- or amine-substituted aliphatic group of up to about 30 carbon atoms in each case. Typically, R 5 is H or lower alkyl (an alkyl group having 1 to about 5 carbon atoms), especially H. Alkylenepolyamines of this kind include: methylenepolyamines, ethylenepolyamines, butylenepolyamines, propylenepolyamines, pentylenepolyamines, 10 hexylenepolyamines and heptylenepolyamines. The higher homologs of such amines and related aminoalkyl-substituted piperazines are likewise included. Specific alkylenepolyamines for preparation of the polyalkene-substituted amines are the following: ethylenediamine, diethylenetriamine, triethylenetetramine, 15 tetraethylenepentamine, propylenediamine, 3-dimethylaminopropylamine, trimethylenediamine, hexamethylene-diamine, decamethylenediamine, octamethylenediamine, di(heptamethylene)triamine, tripropylenetetramine, pentaethylenehexamine, di(trimethylenetriamine), N-(2-aminoethyl)piperazine and 1,4 bis(2-aminoethyl)piperazine. 20 Ethylenepolyamines, such as those mentioned above, are particularly suitable for reasons of cost and effectiveness. Polyamines of this kind are described in detail in the chapter "Diamine und hdhere Amine" [Diamines and higher amines] in Encyclopedia of Chemical Technology, second edition, Kirk-Othmer, volume 7, pages 27-39, 25 Interscience Publishers, division of John Wiley & Sons, 1965. Compounds of this kind are most conveniently prepared by the reaction of an alkylene chloride with ammonia or by reaction of an ethyleneimine with a ring-opening reagent such as ammonia. These reactions lead to preparation of complex mixtures of alkylenepolyamines, including cyclic condensation products such as piperazines. 30 Other suitable types of polyamine mixtures are the products which are formed as residue by stripping the above-described polyamine mixtures and are frequently referred to as "polyamine bottoms". In general, alkylenepolyamine bottom products those which comprise less than two, usually less than 1%, by weight of material that 35 boils below about 200*C. A typical example of such ethylenepolyamine bottoms is that M/54171 -PCT 30 of the products designated "E-100" from Dow Chemical Company in Freeport, Texas. These alkylenepolyamine bottoms comprise cyclic condensation products such as piperazine and higher analogs of diethylenetriamine, triethylenetetramines and the like. 5 Hydroxyl group-comprising polyamines comprise: hydroxyalkylalkylenepolyamines having one or more hydroxyalkyl substituents on the nitrogen atoms. Polyamines of this kind can be prepared by reacting the above-described alkylenepolyamines with one or more alkylene oxides (e.g. ethylene oxide, propylene oxide and butylene oxide). Similar alkylene oxide-alkanolamine reaction products may also, for example, be the products 10 of the reaction of primary, secondary or tertiary alkanolamines with ethylene, propylene or higher epoxides in a molar ratio of 1:1 to 1:2. Reactant ratios and temperatures for performance of such reactions are known to those skilled in the art. In another embodiment, the hydroxyalkyl-substituted alkylenepolyamine may be a 15 compound in which the hydroxyalkyl group is a hydroxy-lower alkyl group, i.e. has fewer than eight carbon atoms. Examples of such hydroxyalkyl-substituted polyamines include N-(2-hydroxyethyl)ethylenediamine (also known as 2-(2 aminoethylamino)ethanol), N,N-bis(2-hydroxyethyl)ethylenediamine, 1-(2 hydroxyethyl)piperazine, monohydroxypropyl-substituted diethylenetriamine, 20 dihydroxypropyl-substituted tetraethylenepentamine and N-(3 hydroxybutyl)tetramethylenediamine. Aryl polyamines are analogs of the abovementioned aromatic monoamines. Examples of aryl polyamines include: N,N'-di-n-butyl-para-phenylenediamine and bis(para 25 aminophenyl)methane. Heterocyclic mono- and polyamines may comprise: aziridines, azetidines, azolidines, pyridines, pyrroles, indoles, piperidines, imidazoles, piperazines, isoindoles, purines, morpholines, thiomorpholines, N-aminoalkylmorpholines, N-aminoalkylthiomorpholines, N-aminoalkylpiperazines, N,N'-diaminoalkylpiperazines, azepines, azocines, azonines, 30 azecines and tetra-, di- and perhydro derivatives of each of the above compounds and mixtures of two or more of these heterocyclic amines. Typical heterocyclic amines are saturated 5- and 6-membered heterocyclic amines having only nitrogen, oxygen and/or sulfur in the heterocycle, especially piperidines, piperazines, thiomorpholines, morpholines, pyrrolidines and the like. Piperidine, aminoalkyl-substituted piperidines, 35 piperazine, aminoalkyl-substituted piperazines, morpholine, aminoalkyl-substituted M/54171 -PCT 31 morpholines, pyrrolidine and aminoalkyl-substituted pyrrolidines are particularly preferred. Usually, the aminoalkyl substituents are bonded to a nitrogen atom which is part of the heterocycle. 5 Specific examples of such heterocyclic amines include N-aminopropylmorpholine, N aminoethylpiperazine and N,N'-diaminoethylpiperazine. Hydroxyheterocyclic polyamines are also suitable. Examples include: N-(2-hydroxyethyl)cyclohexylamine, 3 hydroxycyclopentylamine, para-hydroxyaniline and N-hydroxyethylpiperazine. 10 Examples of polyalkene-substituted amines are as follows: poly(propylene)amine, poly(butene)amine, N,N-dimethylpolyisobutyleneamines; polybutenemorpholines, N,N poly(butene)ethylenediamine, N-poly(propylene)trimethylenediamine, N-poly(butene), diethylenetriamine, N',N'-poly(butene)tetraethylenepentamine and N,N-dimethyl-N' poly(propylene)-1,3-propylenediamine. 15 The number-average molecular weight of such polyalkene-substituted amines is about 500 to about 5000, for example 1000 to about 1500 or about 500 to about 3000. Any of the abovementioned polyalkene-substituted amines which are secondary or 20 primary amines can be alkylated to tertiary amines with alkylating agents which are also known as quaternizing agents, such as dialkyl sulfates, alkyl halides, hydrocarbyl substituted carbonates; hydrocarbyl epoxides in combination with an acid and mixtures thereof. If particular quaternizing agents, such as alkyl halides or dialkyl sulfates, are used, it may be necessary to provide a base or basic compositions, such as sodium 25 carbonate or sodium hydroxide, to give the free tertiary amine form. Primary amines require two equivalents of alkylating agent and two equivalents of base to obtain a tertiary amine. In another embodiment, the alkylation of primary amines can frequently be conducted in four successive steps, first a treatment with the alkylating agent and second treatment with a base and then repetition of the two steps. In another 30 embodiment, the alkylation of a primary amine will be effected in one step, for example using two moles of alkyl halide in the presence of an excess of heterogeneous base, such as sodium carbonate. The polyamine can be exhaustively or partially alkylated in a manner known per se. M/54171-PCT 32 In another embodiment, the alkylation of primary amines and secondary amines to tertiary amines can be effected with epoxides. Unlike the use of the alkyl halides, no treatment with base is required in the case of use of an epoxide to obtain the free amine. Typically, in the case of alkylation of amines with epoxides, at least one mole of 5 epoxide is used for each hydrogen atom in the amine. In the alkylation to give the tertiary amine with an epoxide, neither additional acid nor base is required. Particular preference is additionally given to polyisobutenedimethylamine obtainable by hydroformylating polyisobutene (Mn 1000) and subsequent reductive amination with 10 dimethylamine; see Example B of WO 2008/060888. A3.4) Reaction products of a hydrocarbyl-substituted acylating agent and a compound comprising a nitrogen or oxygen atom and additionally comprising at least one quatemizable amino group 15 Compounds of this kind are described, for example, in the applicant's W02013/000997, which is hereby explicitly incorporated by reference. Suitable hydrocarbyl-substituted polycarboxylic acid compounds, or hydrocarbyl 20 substituted acylating agents, include: The polycarboxylic acid compounds used are aliphatic di- or polybasic (for example tri or tetrabasic), especially from di-, tri- or tetracarboxylic acids and analogs thereof, such as anhydrides or lower alkyl esters (partially or completely esterified), and are 25 optionally substituted by one or more (for example 2 or 3), especially one long-chain alkyl radical and/or one high molecular weight hydrocarbyl radical, especially one polyalkylene radical. Examples are C3-C polycarboxylic acids, such as the dicarboxylic acids malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid and sebacic acid, and the branched analogs thereof; and the 30 tricarboxylic acid citric acid; and anhydrides or lower alkyl esters thereof of. The polycarboxylic acid compounds can also be obtained from the corresponding monounsaturated acids and addition of at least one long-chain alkyl radical and/or high molecular weight hydrocarbyl radical. Examples of suitable monounsaturated acids are fumaric acid, maleic acid, itaconic acid. 35 M/54171-PCT 33 The hydrophobic "long-chain" or "high molecular weight" hydrocarbyl radical which ensures sufficient solubility of the quaternized product in the fuel has a number average molecular weight (MN) of 85 to 20 000, for example 113 to 10 000, or 200 to 10 000 or 350 to 5000, for example 350 to 3000, 500 to 2500, 700 to 2500, or 800 to 5 1500. Typical hydrophobic hydrocarbyl radicals include polypropenyl, polybutenyl and polyisobutenyl radicals, for example with a number-average molecular weight Ma of 3500 to 5000, 350 to 3000, 500 to 2500, 700 to 2500 and 800 to 1500. Suitable hydrocarbyl-substituted compounds are described, for example, in 10 DE 43 19 672 and W02008/138836. Suitable hydrocarbyl-substituted polycarboxylic acid compounds also comprise polymeric, especially dimeric, forms of such hydrocarbyl-substituted polycarboxylic acid compounds. Dimeric forms comprise, for example, two acid anhydride groups which 15 can be reacted independently with the quaternizable nitrogen compound in the preparation process according to the invention. The quaternizable nitrogen compounds reactive with the above polycarboxylic acid compound are selected from 20 a. hydroxyalkyl-substituted mono- or polyamines having at least one quaternized (e.g. choline) or quaternizable primary, secondary or tertiary amino group; b. straight-chain or branched, cyclic, heterocyclic, aromatic or nonaromatic polyamines having at least one primary or secondary (anhydride-reactive) amino group and having at least one quaternized or quaternizable primary, secondary or 25 tertiary amino group; c. piperazines. The quaternizable nitrogen compounds are especially selected from d. hydroxyalkyl-substituted primary, secondary, tertiary or quaternary monoamines 30 and hydroxyalkyl-substituted primary, secondary, tertiary or quaternary diamines; e. straight-chain or branched aliphatic diamines having two primary amino groups; di- or polyamines having at least one primary and at least one secondary amino group; di- or polyamines having at least one primary and at least one tertiary amino group; di- or polyamines having at least one primary and at least one 35 quaternary amino group; aromatic carbocyclic diamines having two primary amino M/54171-PCT 34 groups; aromatic heterocyclic polyamines having two primary amino groups; aromatic or nonaromatic heterocycles having one primary and one tertiary amino group. 5 Examples of suitable "hydroxyalkyl-substituted mono- or polyamines" are those provided with at least one hydroxyalkyl substituent, for example 1, 2, 3, 4, 5 or 6 hydroxyalkyl substituent. Examples of "hydroxyalkyl-substituted monoamines" include: N-hydroxyalkyl 10 monoamines, N,N-dihydroxyalkyl monoamines and N,N,N-trihydroxyalkyl monoamines, where the hydroxyalkyl groups are the same or different and are also as defined above. Hydroxyalkyl is especially 2-hydroxyethyl, 3-hydroxypropyl or 4-hydroxybutyl. For example, the following "hydroxyalkyl-substituted polyamines" and especially 15 "hydroxyalkyl-substituted diamines" may be mentioned: (N-hydroxyalkyl)alkylene diamines, N,N-dihydroxyalkylalkylenediamines, where the hydroxyalkyl groups are the same or different and are also as defined above. Hydroxyalkyl is especially 2 hydroxyethyl, 3-hydroxypropyl or 4-hydroxybutyl; alkylene is especially ethylene, propylene or butylene. 20 Suitable "diamines" are alkylenediamines, and the N-alkyl-substituted analogs thereof, such as N-monoalkylated alkylenediamines and the N,N- or N,N'-dialkylated alkylenediamines. Alkylene is especially straight-chain or branched C17- or C14 alkylene as defined above. Alkyl is especially CI 4 -alkyl as defined above. Examples 25 are especially ethylenediamine, 1,2-propylenediamine, 1,3-propylenediamine, 1,4 butylenediamine and isomers thereof, pentanediamine and isomers thereof, hexanediamine and isomers thereof, heptanediamine and isomers thereof, and singly or multiply, for example singly or doubly, C-C 4 -alkylated, for example methylated, derivatives of the aforementioned diamine compounds such as 3-dimethylamino-1 30 propylamine (DMAPA), N,N-diethylaminopropylamine and N,N-dimethylamino ethylamine. Suitable straight-chain "polyamines" are, for example, dialkylenetriamine, trialkylenetetramine, tetraalkylenepentamine, pentaalkylenehexamine, and the N-alkyl 35 substituted analogs thereof, such as N-monoalkylated and the N,N- or N,N' M/54171-PCT 35 dialkylated alkylenepolyamines. Alkylene is especially straight-chain or branched C 1

.

7 or C 4 -alkylene as defined above. Alkyl is especially C1 4 -alkyl as defined above. Examples are especially diethylenetriamine, triethylenetetramine, 5 tetraethylenepentamine, pentaethylenehexamine, dipropylenetriamine, tripropylenetetramine, tetrapropylenepentamine, pentapropylenehexamine, dibutylenetriamine, tributylenetetramine, tetrabutylenepentamine, pentabutylenehexamine; and the N,N-dialkyl derivatives thereof, especially the N,N-di

C

1 w-alkyl derivatives thereof. Examples include: N,N-dimethyldimethylenetriamine, 10 N, N-diethyldimethylenetriamine, N, N-dipropyldimethylenetriamine, N,N dimethyldiethylene-1,2-triamine, N, N-diethyldiethylene-1,2-triamine, N,N dipropyldiethylene-1,2-triamine, N,N-dimethyldipropylene-1,3-triamine (i.e. DMAPAPA), N,N-diethyldipropylene-1,3-triamine, N,N-dipropyldipropylene-1,3-triamine, N,N dimethyldibutylene-1,4-triamine, N,N-diethyldibutylene-1,4-triamine, N,N 15 dipropyldibutylene-1,4-triamine, N,N-dimethyldipentylene-1,5-triamine, N, N diethyldipentylene-1,5-triamine, N, N-dipropyldipentylene-1,5-triamine, N,N dimethyldihexylene-1,6-triamine, N, N-diethyldihexylene-1,6-triamine and N,N dipropyldihexylene-1,6-triamine. 20 "Aromatic carbocyclic diamines" having two primary amino groups are the diamino substituted derivatives of benzene, biphenyl, naphthalene, tetrahydronaphthalene, fluorene, indene and phenanthrene. "Aromatic or nonaromatic heterocyclic polyamines" having two primary amino groups 25 are the derivatives, substituted by two amino groups, of the following heterocycles: - 5- or 6-membered, saturated or monounsaturated heterocycles comprising one to two nitrogen atoms and/or one oxygen or sulfur atom or one or two oxygen and/or sulfur atoms as ring members, for example tetrahydrofuran, pyrrolidine, isoxazolidine, 30 isothiazolidine, pyrazolidine, oxazolidine, thiazolidine, imidazolidine, pyrroline, piperidine, piperidinyl, 1,3-dioxane, tetrahydropyran, hexahydropyridazine, hexahydropyrimidine, piperazine; - 5-membered aromatic heterocycles comprising, in addition to carbon atoms, one, 35 two or three nitrogen atoms or one or two nitrogen atoms and one sulfur or oxygen M/54171-PCT atom as ring members, for example furan, thiane, pyrrole, pyrazole, oxazole, thiazole, imidazole and 1,3,4-triazole; isoxazole, isothiazole, thiadiazole, oxadiazole; - 6-membered heterocycles comprising, in addition to carbon atoms, one or two, or 5 one, two or three, nitrogen atoms as ring members, for example pyridinyl, pyridazine, pyrimidine, pyrazinyl, 1,2,4-triazine, 1,3,5-triazin-2-yl. "Aromatic or nonaromatic heterocycles having one primary and one tertiary amino group" are, for example, the abovementioned N-heterocycles which are aminoalkylated 10 on at least one ring nitrogen atom, and especially bear an amino-C4-alkyl group. "Aromatic or nonaromatic heterocycles having a tertiary amino group and a hydroxyalkyl group" are, for example, the abovementioned N-heterocycles which are hydroxyalkylated on at least one ring nitrogen atom, and especially bear a hydroxy-C 15 4 -alkyl group. Particular mention should be made of the following groups of individual classes of quaternizable nitrogen compounds: 20 Group 1: NAME FORMULA Diamines with primary second nitrogen atom Ethylenediamine

H

2 N NH 2

NH

2 1,2-Propylenediamine

H

2 N 1,3-Propylenediamine H 2 N NH 2 Isomeric butylenediamines, for example H 2 N NH 2 1,5-Pentylenediamine H 2

NNH

2 Isomeric pentanediamines, for example NH 2 Isomeric hexanediamines, for example H2N N H2 M/54171-PCT 37 Isomeric heptanediamines, for example

H

2 N NH 2 Di- and polyamines with a secondary second nitrogen atom H 2N N -,,,NH2 Diethylenetriamine (DETA) N H Dipropylenetriamine (DPTA), 3,3'- H iminobis(N,N-dimethylpropylamine) H 2 N N NH2 H Triethylenetetramine (TETA)

H

2 N N N NH H 2 N H 2 H2N Tetraethylenepentamine (TEPA) H N N N H H H2N NH2 HN Pentaethylenehexamine H NN N H H N-Methyl-3-amino-1-propylamine N N H 2 H H Bishexamethylenetriamine N NH2

__________________________NH

2 Aromatics Diaminobenzenes, for example H2N

H

2 N

H

2 N Diaminopyridines, for example

H

2 N N Group 2: NAME FORMULA Heterocycles M/54171-PCT 38 H N NA 1-(3-Aminopropyl)imidazole H2N N 0 4-(3-Aminopropyl)morpholine NN 0 2 N NH 2 1-(2-Aminoethylpiperidine) N NH2 NH2 2-(1-Piperazinyl)ethylamine (AEP) N N N-Methylpiperazine N N Amines with a tertiary second nitrogen atom H2N N 3,3-Diamino-N-methyldipropylamine

NH

2 3-Dimethylamino-1-propylamine (DMAPA) H 2 N'- "'N N,N-Diethylaminopropylamine H2N N N,N-Dimethylam inoethylamine N Group 3: NAME FORMULA Alcohols with a primary and secondary amine Ethanolamine

H

2 N OH 3-Hydroxy-1 -propylam ine

H

2 N OH M/54171-PCT 39 H HO N Diethanolamine HO OH H Diisopropanolamine HON O H H N-(2-Hydroxyethyl)ethylenediamine

NH

2 HO Alcohols with a tertiary amine OH Triethanolamine, (2,2',2"-nitrilotriethanol) H OH HO NI 1-(3-Hydroxypropyl)imidazole N HO -- OH Tris(hydroxymethyl)amine N OH 3-Dimethylamino-1 -propanol OH 3-Diethylamino-1 -propanol HO ' N 2-Dimethylamino-1 -ethanol N 4-Diethylamino-1 -butanol HO N M/54171-PCT 40 The hydrocarbyl-substituted polycarboxylic acid compound can be reacted with the quaternizable nitrogen compound under thermally controlled conditions, such that there 5 is essentially no condensation reaction. More particularly, no formation of water of reaction is observed in that case. More particularly, such a reaction is effected at a temperature in the range from 10 to 80*C, especially 20 to 600C or 30 to 500C. The reaction time may be in the range from a few minutes or a few hours, for example about 1 minute up to about 10 hours. The reaction can be effected at a pressure of 10 about 0.1 to 2 atm, but especially at approximately standard pressure. For example, an inert gas atmosphere, for example nitrogen, is appropriate. More particularly, the reaction can also be effected at elevated temperatures which promote condensation, for example in the range from 90 to 100*C or 100 to 170*C. 15 The reaction time may be in the region of a few minutes or a few hours, for example about 1 minute up to about 10 hours. The reaction can be effected at pressure at about 0.1 to 2 atm, but especially at about standard pressure. The reactants are initially charged especially in about equimolar amounts; optionally, a 20 small molar excess of the polycarboxylic acid compound, for example a 0.05- to 0.5 fold, for example a 0.1- to 0.3-fold, excess, is desirable. If required, the reactants can be initially charged in a suitable inert organic aliphatic or aromatic solvent or a mixture thereof. Typical examples are, for example, solvents of the Solvesso series, toluene or xylene. The solvent can also serve, for example, to remove water of condensation 25 azeotropically from the reaction mixture. More particularly, however, the reactions are performed without solvent. The reaction product thus formed can theoretically be purified further, or the solvent can be removed. Usually, however, this is not absolutely necessary, such that the 30 reaction product can be transferred without further purification into the next synthesis step, the quaternization. Particular mention should be made of the condensation product of polyisobutylenesuccinic anhydride (Glissopal@ SA from BASF, prepared from 35 polyisobutene (Mn 1000) and maleic anhydride in a known manner) and N,N-dimethyl 1,3-diaminopropane (CAS 109-55-7), see Preparation example 1 of WO 2013/000997. M/54171-PCT 41 A4) Quatemizing agents: In a further particular embodiment, the at least one quaternizable tertiary nitrogen atom 5 is quaternized with at least one quaternizing agent selected from epoxides, especially hydrocarbyl epoxides. dd d (4) Rd Rd 10 where the Rd radicals present therein are the same or different and are each H or a hydrocarbyl radical, where the hydrocarbyl radical has at least 1 to 10 carbon atoms. More particularly, these are aliphatic or aromatic radicals, for example linear or branched Ci-io-alkyl radicals, or aromatic radicals, such as phenyl or C 1 -- alkylphenyl. 15 Examples of suitable hydrocarbyl epoxides include aliphatic and aromatic alkylene oxides such as, more particularly, C2- 1 2-alkylene oxides such as ethylene oxide, propylene oxide, 1,2-butylene oxide, 2,3-butylene oxide, 2-methyl- 1,2-propene oxide (isobutene oxide), 1,2-pentene oxide, 2,3-pentene oxide, 2-methyl-1,2-butene oxide, 3 methyl- 1,2-butene oxide, 1,2-hexene oxide, 2,3-hexene oxide, 3,4-hexene oxide, 2 20 methyl-1,2-pentene oxide, 2-ethyl-1,2-butene oxide, 3-methyl- 1,2-pentene oxide, 1,2 decene oxide, 1,2-dodecene oxide or 4-methyl-1,2-pentene oxide; and aromatic substituted ethylene oxides such as optionally substituted styrene oxide, especially styrene oxide or 4-methylstyrene oxide. 25 In the case of use of epoxides as quaternizing agents, these are used in the presence of free acids, especially in the presence of free hydrocarbyl-substituted unsaturated, especially saturated, optionally substituted, especially unsubstituted, protic acids, such as particularly with hydrocarbyl-substituted dicarboxylic acids, especially hydrocarbyl substituted C3-C28 or C3-C 1 2-dicarboxylic acids, especially unsubstituted saturated C3 30 C6-dicarboxylic acid. Suitable dicarboxylic acids here are saturated acids such as malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecanedioic acid and dodecanedioic acid, or higher molecular weight acids, such as M/54171-PCT 42 tetra-, hexa- or octadecanedioic acid; substituted acids, such as malic acid, a ketoglutaric acid, oxaloacetic acid; glutamic acid; aspartic acid; and unsaturated acids, such as maleic acid and fumaric acid; such as, more particularly, malonic acid, succinic acid, glutaric acid, adipic acid and pimelic acid. 5 Additionally suitable are aromatic dicarboxylic acids, for example phthalic acid. If required or desired, it is also possible to use hydrocarbyl-substituted dicarboxylic acids in their anhydride form. For the quaternization, the ring opening of the anhydride 10 is then brought about by addition of water. Further configurations relating to hydrocarbyl-substituted dicarboxylic acids: The hydrocarbyl-substituted dicarboxylic acids can be prepared by hydrolysis of the 15 corresponding hydrocarbyl-substituted dicarboxylic anhydrides in a manner known in principle, as described, for example, in DE 2443537. The hydrolysis is preferably conducted with stoichiometric amounts of water at temperatures of 50 to 150*C, but it is also possible to use an excess of water. The hydrolysis can be conducted without solvent or in the presence of an inert solvent. Typical examples are, for example, 20 solvents from the Solvesso series, toluene, xylene or straight-chain and branched saturated hydrocarbons such as paraffins or naphthenes. The solvent can be removed after the hydrolysis, but preferably remains, and is used as solvent or cosolvent for the subsequent quaternization. 25 Preferred hydrocarbyl-substituted dicarboxylic anhydrides are hydrocarbyl-substituted succinic anhydrides, as sold, for example, by Pentagon: n-dodecenylsuccinic anhydride CAS 19780-11-1, n-octadecenylsuccinic anhydride CAS 28777-98-2, i octadecenylsuccinic anhydride CAS 28777-98-2, i-hexadecenylsuccinic anhydride/i octadecenylsuccinic anhydride CAS 32072-96-1 & 28777-98-2, n-octenylsuccinic 30 anhydride CAS 26680-54-6, tetrapropenylsuccinic anhydride CAS 26544-38-7. Additionally preferred is polyisobutenesuccinic anhydride (PIBSA). The preparation of PIBSA from polyisobutene (PIB) and maleic anhydride (MA) is known in principle and leads to a mixture of PIBSA and bismaleated PIBSA (BM PIBSA, please see scheme 1 35 below), which is generally not purified but processed further as it is. The ratio of the two M/54171-PCT 43 components to one another can be reported as the bismaleation level (BML). The BML is known in principle (see US 5,883,196) and is determined as described in US 5,883,196. 5 Scheme 1 0 0 0 0 0+0 0 PIB MA PIBSA BM PIBSA Especially preferred is PIBSA having a bismaleation level of up to 30%, preferably up to 25% and more preferably up to 20%. In general, the bismaleation level is at least 10 2%, preferably at least 5% and more preferably at least 10%. Controlled preparation is described, for example, in US 5,883,196. For the preparation, high-reactivity PIB (HR PIB) having Mn in the range from 500 to 3000, for example 550 to 2500, 800 to 1200 or 900 to 1100 is particularly suitable. Mn is determined by means of GPC as described in US 5,883,196. Particularly preferred PIBSA prepared from HR-PIB (Mn = 1000) has 15 hydrolysis numbers of 85-95 mg KOH/g. A nonlimiting example of a particularly suitable PIBSA is Glissopal* SA F from BASF, prepared from HR-PIB (Mn = 1000) having a bismaleation level of 15% and a hydrolysis number of 90 mg KOH/g. 20 It is also conceivable, albeit less preferable, to react the abovementioned hydrocarbyl substituted dicarboxylic anhydrides not with water but with an alcohol, preferably a monoalcohol, more preferably an alkanol, or an amine to give the corresponding monoester or monoamide of the hydrocarbyl-substituted dicarboxylic acids. What is 25 important is that one acid function remains in the molecule in the case of such a reaction. We the quaternization is conducted in the presence of an alcohol, preference is given to using the same alcohol for such a reaction of the hydrocarbyl-substituted 30 dicarboxylic anhydrides as that used as solvent in the quaternization, i.e. preferably 2 M/54171-PCT 44 ethylhexanol or 2-propylheptanol, or else butyldiglycol, butylglycol, methoxypropoxypropanol or butoxydipropanol. Such an alcoholysis is preferably conducted with stoichiometric amounts of alcohol or 5 amine at temperatures of 50 to 1500C, but it is also possible to use an excess of alcohol or amine, preferably alcohol. In that case, the latter appropriately remains in the reaction mixture and serves as solvent in the subsequent quaternization. A5) Preparation of inventive additives: 10 a) Quaternization The quaternization with an epoxide of the formula (4) is likewise based on known processes. When the boiling temperature of one component of the reaction mixture, 15 especially of the epoxide, at standard pressure is above the reaction temperature, the reaction is appropriately performed in an autoclave. For example, in an autoclave, a solution of the tertiary amine is admixed with the organic hydrocarbyl-substituted dicarboxylic acid (for example polyisobutenesuccinic 20 acid) in the required, approximately stoichiometric amounts. It is possible to use, for example, 0.1 to 2.0, 0.2 to 1.5 or 0.5 to 1.25 equivalents of dicarboxylic acid per equivalent of quaternizable tertiary nitrogen atom. More particularly, however, approximately molar proportions of the dicarboxylic acid are used. This is followed by sufficient purging with N 2 , and establishment of a suitable supply pressure, and 25 metered addition of the epoxide (e.g. propylene oxide) in the stoichiometric amounts required at a temperature between 200C and 1800C. It is possible to use, for example, 0.1 to 4.0, 0.2 to 3 or 0.5 to 2 equivalents of epoxide per equivalent of quaternizable tertiary nitrogen atom. More particularly, however, about 1 to 2 equivalents of epoxide are used in relation to the tertiary amine, in order to fully quaternize the tertiary amine 30 group. More particularly, it is also possible to use a molar excess of alkylene oxide, as a result of which the free carboxyl group of the dicarboxylic acid is partly or fully esterified. This is followed by stirring over a suitably long period of a few minutes to about 24 hours, for example about 10 h, at a temperature between 200C and 180*C (e.g. 50*C), cooling, for example to about 20 to 500C, purging with N 2 and emptying of 35 the reactor. M/54171-PCT 45 The reaction can be effected at a pressure of about 0.1 to 20 bar, for example 1 to 10 or 1.5 to 5 bar. However, the reaction can also be effected at standard pressure. An inert gas atmosphere is particularly appropriate, for example nitrogen. 5 If required, the reactants can be initially charged for the quaternization in a suitable inert organic aliphatic or aromatic solvent or a mixture thereof. Typical examples are, for example, solvents from the Solvesso series, toluene or xylene or 2-ethylhexanol, or 2-propylheptanol, and also butyldiglycol, butylglycol, methoxypropoxypropanol, 10 butoxydipropanol or straight-chain or branched saturated hydrocarbons such as paraffins or naphthenes. However, the quaternization can also be performed in the absence of a solvent. The quaternization can be performed in the presence of a protic solvent, optionally also 15 in combination with an aliphatic or aromatic solvent. Suitable protic solvents especially have a dielectric constant (at 200C) of greater than 7. The protic solvent may comprise one or more OH groups and may also be water. Suitable solvents may also be alcohols, glycols and glycol ethers. More particularly, suitable protic solvents may be those specified in WO 2010132259. Especially suitable solvents are methanol, ethanol, 20 n-propanol, isopropanol, all isomers of butanol, all isomers of pentanol, all isomers of hexanol, 2-ethylhexanol, 2-propylheptanol, and also mixtures of various alcohols. The presence of a protic solvent can have a positive effect on the conversion and the reaction rate of the quaternization. 25 b) Workup of the reaction mixture The reaction end product thus formed can theoretically be purified further, or the solvent can be removed. Optionally, excess reagent, for example excess epoxide, can be removed. This can be accomplished, for example, by introducing nitrogen at 30 standard pressure or under reduced pressure. In order to improve the further processability of the products, however, it is also possible to add solvents after the reaction, for example solvents of the Solvesso series, 2-ethylhexanol, or essentially aliphatic solvents. Usually, however, this is not absolutely necessary, and so the reaction product is usable without further purification as an additive, optionally after 35 blending with further additive components (see below). M/54171-PCT 46 In a preferred embodiment of the present invention, the quaternized ammonium compounds have a weight loss in a thermogravimetric analysis (TGA) at 350*C of less than 50% by weight, for example less than 40%, less than 35%, less than 30%, less 5 than 20% or less than 15%, for example down to 0% to 5% weight loss. For this purpose, a thermogravimetric analysis (TGA) is conducted in accordance with standard ISO-4154. Specifically, in the test, a run from 50* to 9000C is conducted at a rate of temperature rise of 200C per minute under a nitrogen atmosphere at a flow rate 10 of 60 mL per minute. B) Further additive components The fuel additized with the inventive quaternized additive is a gasoline fuel or especially 15 a middle distillate fuel, in particular a diesel fuel. The fuel may comprise further customary additives to improve efficacy and/or suppress wear. 20 In the case of diesel fuels, these are primarily customary detergent additives, carrier oils, cold flow improvers, lubricity improvers, corrosion inhibitors, demulsifiers, dehazers, antifoams, cetane number improvers, combustion improvers, antioxidants or stabilizers, antistats, metallocenes, metal deactivators, dyes and/or solvents. 25 In the case of gasoline fuels, these are in particular lubricity improvers (friction modifiers), corrosion inhibitors, demulsifiers, dehazers, antifoams, combustion improvers, antioxidants or stabilizers, antistats, metallocenes, metal deactivators, dyes and/or solvents. 30 Typical examples of suitable coadditives are listed in the following section: B1) Detergent additives M/54171-PCT 47 The customary detergent additives are preferably amphiphilic substances which possess at least one hydrophobic hydrocarbon radical with a number-average molecular weight (M,) of 85 to 20 000 and at least one polar moiety selected from: 5 (Da) mono- or polyamino groups having up to 6 nitrogen atoms, at least one nitrogen atom having basic properties; (Db) nitro groups, optionally in combination with hydroxyl groups; 10 (Dc) hydroxyl groups in combination with mono- or polyamino groups, at least one nitrogen atom having basic properties; (Dd) carboxyl groups or the alkali metal or alkaline earth metal salts thereof; 15 (De) sulfonic acid groups or the alkali metal or alkaline earth metal salts thereof; (Do polyoxy-C2- to C 4 -alkylene moieties terminated by hydroxyl groups, mono- or polyamino groups, at least one nitrogen atom having basic properties, or by carbamate groups; 20 (Dg) carboxylic ester groups; (Dh) moieties derived from succinic anhydride and having hydroxyl and/or amino and/or amido and/or imido groups; and/or 25 (Di) moieties obtained by Mannich reaction of substituted phenols with aldehydes and mono- or polyamines. The hydrophobic hydrocarbon radical in the above detergent additives, which ensures 30 adequate solubility in the fuel, has a number-average molecular weight (Mn) of 85 to 20 000, preferably of 113 to 10 000, more preferably of 300 to 5000, even more preferably of 300 to 3000, even more especially preferably of 500 to 2500 and especially of 700 to 2500, in particular of 800 to 1500. As typical hydrophobic hydrocarbon radicals, especially in conjunction with the polar, especially polypropenyl, 35 polybutenyl and polyisobutenyl radicals with a number-average molecular weight M, of M/54171-PCT 48 preferably in each case 300 to 5000, more preferably 300 to 3000, even more preferably 500 to 2500, even more especially preferably 700 to 2500 and especially 800 to 1500 into consideration. 5 Examples of the above groups of detergent additives include the following: Additives comprising mono- or polyamino groups (Da) are preferably polyalkenemono or polyalkenepolyamines based on polypropene or on high-reactivity (i.e. having predominantly terminal double bonds) or conventional (i.e. having predominantly 10 internal double bonds) polybutene or polyisobutene with Ma = 300 to 5000, more preferably 500 to 2500 and especially 700 to 2500. Such additives based on high reactivity polyisobutene, which can be prepared from the polyisobutene which may comprise up to 20% by weight of n-butene units by hydroformylation and reductive amination with ammonia, monoamines or polyamines such as 15 dimethylaminopropylamine, ethylenediamine, diethylenetriamine, triethylenetetramine or tetraethylenepentamine, are known especially from EP-A 244 616. When polybutene or polyisobutene having predominantly internal double bonds (usually in the P and y positions) are used as starting materials in the preparation of the additives, a possible preparative route is by chlorination and subsequent amination or by oxidation of the 20 double bond with air or ozone to give the carbonyl or carboxyl compound and subsequent amination under reductive (hydrogenating) conditions. The amines used here for the amination may be, for example, ammonia, monoamines or the abovementioned polyamines. Corresponding additives based on polypropene are described more particularly in WO-A 94/24231. 25 Further particular additives comprising monoamino groups (Da) are the hydrogenation products of the reaction products of polyisobutenes having an average degree of polymerization P = 5 to 100 with nitrogen oxides or mixtures of nitrogen oxides and oxygen, as described more particularly in WO-A 97/03946. 30 Further particular additives comprising monoamino groups (Da) are the compounds obtainable from polyisobutene epoxides by reaction with amines and subsequent dehydration and reduction of the amino alcohols, as described more particularly in DE A 196 20 262. 35 M/54171-PCT 49 Additives comprising nitro groups (Db), optionally in combination with hydroxyl groups, are preferably reaction products of polyisobutenes having an average degree of polymerization P = 5 to 100 or 10 to 100 with nitrogen oxides or mixtures of nitrogen oxides and oxygen, as described more particularly in WO-A 96/03367 and in WO-A 5 96/03479. These reaction products are generally mixtures of pure nitropolyisobutenes (e.g. a,p-dinitropolyisobutene) and mixed hydroxynitropolyisobutenes (e.g. a-nitro-p hydroxypolyisobutene). Additives comprising hydroxyl groups in combination with mono- or polyamino groups 10 (Dc) are especially reaction products of polyisobutene epoxides obtainable from polyisobutene having preferably predominantly terminal double bonds and M, = 300 to 5000, with ammonia or mono- or polyamines, as described more particularly in EP-A 476 485. 15 Additives comprising carboxyl groups or their alkali metal or alkaline earth metal salts (Dd) are preferably copolymers of C2- to C40-olefins with maleic anhydride which have a total molar mass of 500 to 20 000 and wherein some or all of the carboxyl groups have been converted to the alkali metal or alkaline earth metal salts and any remainder of the carboxyl groups has been reacted with alcohols or amines. Such additives are 20 disclosed more particularly by EP-A 307 815. Such additives serve mainly to prevent valve seat wear and can, as described in WO-A 87/01126, advantageously be used in combination with customary fuel detergents such as poly(iso)buteneamines or polyetheramines. 25 Additives comprising sulfonic acid groups or their alkali metal or alkaline earth metal salts (De) are preferably alkali metal or alkaline earth metal salts of an alkyl sulfosuccinate, as described more particularly in EP-A 639 632. Such additives serve mainly to prevent valve seat wear and can be used advantageously in combination with customary fuel detergents such as poly(iso)buteneamines or polyetheramines. 30 Additives comprising polyoxy-C2-C 4 -alkylene moieties (Df) are preferably polyethers or polyetheramines which are obtainable by reaction of C2- to C 6 o-alkanols, C6- to C30 alkanediols, mono- or di-C 2 - to C3o-alkylamines, C- to C3o-alkylcyclohexanols or C- to

C

30 -alkylphenols with 1 to 30 mol of ethylene oxide and/or propylene oxide and/or 35 butylene oxide per hydroxyl group or amino group and, in the case of the M/54171-PCT 50 polyetheramines, by subsequent reductive amination with ammonia, monoamines or polyamines. Such products are described more particularly in EP-A 310 875, EP-A 356 725, EP-A 700 985 and US-A 4 877 416. In the case of polyethers, such products also have carrier oil properties. Typical examples thereof are tridecanol butoxylates or 5 isotridecanol butoxylates, isononylphenol butoxylates and also polyisobutenol butoxylates and propoxylates, and also the corresponding reaction products with ammonia. Additives comprising carboxylic ester groups (Dg) are preferably esters of mono-, di- or 10 tricarboxylic acids with long-chain alkanols or polyols, especially those having a minimum viscosity of 2 mm 2 /s at 1000C, as described more particularly in DE-A 38 38 918. The mono-, di- or tricarboxylic acids used may be aliphatic or aromatic acids, and particularly suitable ester alcohols or ester polyols are long-chain representatives having, for example, 6 to 24 carbon atoms. Typical representatives of the esters are 15 adipates, phthalates, isophthalates, terephthalates and trimellitates of isooctanol, of isononanol, of isodecanol and of isotridecanol. Such products also satisfy carrier oil properties. Additives comprising moieties derived from succinic anhydride and having hydroxyl 20 and/or amino and/or amido and/or especially imido groups (Dh) are preferably corresponding derivatives of alkyl- or alkenyl-substituted succinic anhydride and especially the corresponding derivatives of polyisobutenylsuccinic anhydride which are obtainable by reacting conventional or high-reactivity polyisobutene having Mn = preferably 300 to 5000, more preferably 300 to 3000, even more preferably 500 to 25 2500, even more especially preferably 700 to 2500 and especially 800 to 1500, with maleic anhydride by a thermal route in an ene reaction or via the chlorinated polyisobutene. The moieties having hydroxyl and/or amino and/or amido and/or imido groups are, for example, carboxylic acid groups, acid amides of monoamines, acid amides of di- or polyamines which, in addition to the amide function, also have free 30 amine groups, succinic acid derivatives having an acid and an amide function, carboximides with monoamines, carboximides with di- or polyamines which, in addition to the imide function, also have free amine groups, or diimides which are formed by the reaction of di- or polyamines with two succinic acid derivatives. In the presence of imido moieties D(h), the further detergent additive in the context of the present 35 invention is, however, used only up to a maximum of 100% of the weight of compounds M/54171-PCT 51 with betaine structure. Such fuel additives are common knowledge and are described, for example, in documents (1) and (2). They are preferably the reaction products of alkyl- or alkenyl-substituted succinic acids or derivatives thereof with amines and more preferably the reaction products of polyisobutenyl-substituted succinic acids or 5 derivatives thereof with amines. Of particular interest in this context are reaction products with aliphatic polyamines (polyalkyleneimines) such as especially ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine and hexaethyleneheptamine, which have an imide structure. 10 Additives comprising moieties (Di) obtained by Mannich reaction of substituted phenols with aldehydes and mono- or polyamines are preferably reaction products of polyisobutene-substituted phenols with formaldehyde and mono- or polyamines such as ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine or dimethylaminopropylamine. The polyisobutenyl-substituted phenols may originate 15 from conventional or high-reactivity polyisobutene having Mn = 300 to 5000. Such "polyisobutene Mannich bases" are described more particularly in EP-A 831 141. One or more of the detergent additives mentioned can be added to the fuel in such an amount that the dosage of these detergent additives is preferably 25 to 2500 ppm by 20 weight, especially 75 to 1500 ppm by weight, in particular 150 to 1000 ppm by weight. B2) Carrier oils Carrier oils additionally used may be of mineral or synthetic nature. Suitable mineral 25 carrier oils are fractions obtained in crude oil processing, such as brightstock or base oils having viscosities, for example, from the SN 500 - 2000 class; but also aromatic hydrocarbons, paraffinic hydrocarbons and alkoxyalkanols. Likewise useful is a fraction which is obtained in the refining of mineral oil and is known as "hydrocrack oil" (vacuum distillate cut having a boiling range of from about 360 to 5000C, obtainable from natural 30 mineral oil which has been catalytically hydrogenated under high pressure and isomerized and also deparaffinized). Likewise suitable are mixtures of the abovementioned mineral carrier oils. Examples of suitable synthetic carrier oils are polyolefins (polyalphaolefins or 35 polyinternalolefins), (poly)esters, (poly)alkoxylates, polyethers, aliphatic M/54171-PCT 52 polyetheramines, alkylphenol-started polyethers, alkylphenol-started polyetheramines and carboxylic esters of long-chain alkanols. Examples of suitable polyolefins are olefin polymers having Ma = 400 to 1800, in 5 particular based on polybutene or polyisobutene (hydrogenated or unhydrogenated). Examples of suitable polyethers or polyetheramines are preferably compounds comprising polyoxy-C2- to C4-alkylene moieties obtainable by reacting C2- to C60 alkanols, C6- to C 3 -alkanediols, mono- or di-C 2 - to C 3 o-alkylamines, C- to C30 10 alkylcyclohexanols or Ce to C 30 -alkylphenols with 1 to 30 mol of ethylene oxide and/or propylene oxide and/or butylene oxide per hydroxyl group or amino group, and, in the case of the polyetheramines, by subsequent reductive amination with ammonia, monoamines or polyamines. Such products are described more particularly in EP-A 310 875, EP-A 356 725, EP-A 700 985 and US-A 4,877,416. For example, the 15 polyetheramines used may be poly-C2- to C6-alkylene oxide amines or functional derivatives thereof. Typical examples thereof are tridecanol butoxylates or isotridecanol butoxylates, isononylphenol butoxylates and also polyisobutenol butoxylates and propoxylates, and also the corresponding reaction products with ammonia. 20 Examples of carboxylic esters of long-chain alkanols are more particularly esters of mono-, di- or tricarboxylic acids with long-chain alkanols or polyols, as described more particularly in DE-A 38 38 918. The mono-, di- or tricarboxylic acids used may be aliphatic or aromatic acids; particularly suitable ester alcohols or ester polyols are long chain representatives having, for example, 6 to 24 carbon atoms. Typical 25 representatives of the esters are adipates, phthalates, isophthalates, terephthalates and trimellitates of isooctanol, isononanol, isodecanol and isotridecanol, for example di(n- or isotridecyl) phthalate. Further suitable carrier oil systems are described, for example, in DE-A 38 26 608, DE 30 A 41 42 241, DE-A 43 09 074, EP-A 452 328 and EP-A 548 617. Examples of particularly suitable synthetic carrier oils are alcohol-started polyethers having about 5 to 35, preferably about 5 to 30, more preferably 10 to 30 and especially 15 to 30 C3- to C 6 -alkylene oxide units, for example propylene oxide, n-butylene oxide 35 and isobutylene oxide units, or mixtures thereof, per alcohol molecule. Nonlimiting M/54171-PCT 53 examples of suitable starter alcohols are long-chain alkanols or phenols substituted by long-chain alkyl in which the long-chain alkyl radical is especially a straight-chain or branched C6- to C 1 8 -alkyl radical. Particular examples include tridecanol and nonylphenol. Particularly preferred alcohol-started polyethers are the reaction products 5 (polyetherification products) of monohydric aliphatic C6- to C 1 8-alcohols with C3- to C6 alkylene oxides. Examples of monohydric aliphatic C 6

-C

18 -alcohols are hexanol, heptanol, octanol, 2-ethylhexanol, nonyl alcohol, decanol, 3-propylheptanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, octadecanol and the constitutional and positional isomers thereof. The alcohols can be used either in the 10 form of the pure isomers or in the form of technical grade mixtures. A particularly preferred alcohol is tridecanol. Examples of C3- to C 6 -alkylene oxides are propylene oxide, such as 1,2-propylene oxide, butylene oxide, such as 1,2-butylene oxide, 2,3 butylene oxide, isobutylene oxide or tetrahydrofuran, pentylene oxide and hexylene oxide. Particular preference among these is given to C3- to C4-alkylene oxides, i.e. 15 propylene oxide such as 1,2-propylene oxide and butylene oxide such as 1,2-butylene oxide, 2,3-butylene oxide and isobutylene oxide. Especially butylene oxide is used. Further suitable synthetic carrier oils are alkoxylated alkylphenols, as described in DE A 10 102 913. 20 Particular carrier oils are synthetic carrier oils, particular preference being given to the above-described alcohol-started polyethers. The carrier oil or the mixture of different carrier oils is added to the fuel in an amount of 25 preferably 1 to 1000 ppm by weight, more preferably of 10 to 500 ppm by weight and especially of 20 to 100 ppm by weight. B3) Cold flow improvers 30 Suitable cold flow improvers are in principle all organic compounds which are capable of improving the flow performance of middle distillate fuels or diesel fuels under cold conditions. For the intended purpose, they must have sufficient oil solubility. More particularly, useful cold flow improvers for this purpose are the cold flow improvers (middle distillate flow improvers, MDFIs) typically used in the case of middle distillates 35 of fossil origin, i.e. in the case of customary mineral diesel fuels. However, it is also M/54171-PCT 54 possible to use organic compounds which partly or predominantly have the properties of a wax antisettling additive (WASA) when used in customary diesel fuels. They can also act partly or predominantly as nucleators. It is also possible to use mixtures of organic compounds effective as MDFIs and/or effective as WASAs and/or effective as 5 nucleators. The cold flow improver is typically selected from (K1) copolymers of a C2- to C 40 -olefin with at least one further ethylenically unsaturated monomer; 10 (K2) comb polymers; (K3) polyoxyalkylenes; (K4) polar nitrogen compounds; (K5) sulfocarboxylic acids or sulfonic acids or derivatives thereof; and (K6) poly(meth)acrylic esters. 15 It is possible to use either mixtures of different representatives from one of the particular classes (K1) to (K6) or mixtures of representatives from different classes (K1) to (K6). 20 Suitable C2- to C 40 -olefin monomers for the copolymers of class (K1) are, for example, those having 2 to 20 and especially 2 to 10 carbon atoms, and 1 to 3 and preferably 1 or 2 carbon-carbon double bonds, especially having one carbon-carbon double bond. In the latter case, the carbon-carbon double bond may be arranged either terminally (a olefins) or internally. However, preference is given to a-olefins, particular preference to 25 a-olefins having 2 to 6 carbon atoms, for example propene, 1-butene, 1-pentene, 1 hexene and in particular ethylene. In the copolymers of class (KI), the at least one further ethylenically unsaturated monomer is preferably selected from alkenyl carboxylates, (meth)acrylic esters and 30 further olefins. When further olefins are also copolymerized, they are preferably higher in molecular weight than the abovementioned C2- to C40-olefin base monomer. When, for example, the olefin base monomer used is ethylene or propene, suitable further olefins are M/54171-PCT 55 especially C10- to C 4 o-a-olefins. Further olefins are in most cases only additionally copolymerized when monomers with carboxylic ester functions are also used. Suitable (meth)acrylic esters are, for example, esters of (meth)acrylic acid with Ci- to 5 C2o-alkanols, especially C- to Cio-alkanols, in particular with methanol, ethanol, propanol, isopropanol, n-butanol, sec-butanol, isobutanol, tert-butanol, pentanol, hexanol, heptanol, octanol, 2-ethylhexanol, nonanol and decanol, and structural isomers thereof. 10 Suitable alkenyl carboxylates are, for example, C2- to C14-alkenyl esters, for example the vinyl and propenyl esters, of carboxylic acids having 2 to 21 carbon atoms, whose hydrocarbyl radical may be linear or branched. Among these, preference is given to the vinyl esters. Among the carboxylic acids with a branched hydrocarbyl radical, preference is given to those whose branch is in the a position to the carboxyl group, 15 and the a-carbon atom is more preferably tertiary, i.e. the carboxylic acid is what is called a neocarboxylic acid. However, the hydrocarbyl radical of the carboxylic acid is preferably linear. Examples of suitable alkenyl carboxylates are vinyl acetate, vinyl propionate, vinyl 20 butyrate, vinyl 2-ethylhexanoate, vinyl neopentanoate, vinyl hexanoate, vinyl neononanoate, vinyl neodecanoate and the corresponding propenyl esters, preference being given to the vinyl esters. A particularly preferred alkenyl carboxylate is vinyl acetate; typical copolymers of group (K1) resulting therefrom are ethylene-vinyl acetate copolymers ("EVAs"), which are some of the most frequently used. 25 Ethylene-vinyl acetate copolymers usable particularly advantageously and the preparation thereof are described in WO 99/29748. Suitable copolymers of class (K1) are also those which comprise two or more different alkenyl carboxylates in copolymerized form, which differ in the alkenyl function and/or 30 in the carboxylic acid group. Likewise suitable are copolymers which, as well as the alkenyl carboxylate(s), comprise at least one olefin and/or at least one (meth)acrylic ester in copolymerized form. Terpolymers of a C2- to C4o-a-olefin, a Ci- to C 20 -alkyl ester of an ethylenically 35 unsaturated monocarboxylic acid having 3 to 15 carbon atoms and a C2- to C 1 4-alkenyl M/54171-PCT 56 ester of a saturated monocarboxylic acid having 2 to 21 carbon atoms are also suitable as copolymers of class (K1). Terpolymers of this kind are described in WO 2005/054314. A typical terpolymer of this kind is formed from ethylene, 2-ethylhexyl acrylate and vinyl acetate. 5 The at least one or the further ethylenically unsaturated monomer(s) are copolymerized in the copolymers of class (K1) in an amount of preferably I to 50% by weight, especially 10 to 45% by weight and in particular 20 to 40% by weight, based on the overall copolymer. The main proportion in terms of weight of the monomer units in the 10 copolymers of class (K1) therefore originates generally from the C2- to C4o base olefins. The copolymers of class (Ki) preferably have a number-average molecular weight Mo of 1000 to 20 000, more preferably of 1000 to 10 000 and especially of 1000 to 8000. 15 Typical comb polymers of component (K2) are, for example, obtainable by the copolymerization of maleic anhydride or fumaric acid with another ethylenically unsaturated monomer, for example with an a-olefin or an unsaturated ester, such as vinyl acetate, and subsequent esterification of the anhydride or acid function with an alcohol having at least 10 carbon atoms. Further suitable comb polymers are 20 copolymers of a-olefins and esterified comonomers, for example esterified copolymers of styrene and maleic anhydride or esterified copolymers of styrene and fumaric acid. Suitable comb polymers may also be polyfumarates or polymaleates. Homo- and copolymers of vinyl ethers are also suitable comb polymers. Comb polymers suitable as components of class (K2) are, for example, also those described in WO 25 2004/035715 and in "Comb-Like Polymers. Structure and Properties", N. A. Plat6 and V. P. Shibaev, J. Poly. Sci. Macromolecular Revs. 8, pages 117 to 253 (1974). Mixtures of comb polymers are also suitable. Polyoxyalkylenes suitable as components of class (K3) are, for example, 30 polyoxyalkylene esters, polyoxyalkylene ethers, mixed polyoxyalkylene ester/ethers and mixtures thereof. These polyoxyalkylene compounds preferably comprise at least one linear alkyl group, preferably at least two linear alkyl groups, each having 10 to 30 carbon atoms and a polyoxyalkylene group having a number-average molecular weight of up to 5000. Such polyoxyalkylene compounds are described, for example, in EP A 35 061 895 and also in US 4 491 455. Particular polyoxyalkylene compounds are based M/54171 -PCT 57 on polyethylene glycols and polypropylene glycols having a number-average molecular weight of 100 to 5000. Additionally suitable are polyoxyalkylene mono- and diesters of fatty acids having 10 to 30 carbon atoms, such as stearic acid or behenic acid. 5 Polar nitrogen compounds suitable as components of class (K4) may be either ionic or nonionic and preferably have at least one substituent, especially at least two substituents, in the form of a tertiary nitrogen atom of the general formula >NR 7 in which R 7 is a C8- to C4o-hydrocarbyl radical. The nitrogen substituents may also be quaternized, i.e. be in cationic form. An example of such nitrogen compounds is that of 10 ammonium salts and/or amides which are obtainable by the reaction of at least one amine substituted by at least one hydrocarbyl radical with a carboxylic acid having 1 to 4 carboxyl groups or with a suitable derivative thereof. The amines preferably comprise at least one linear C8- to C 4 O-alkyl radical. Primary amines suitable for preparing the polar nitrogen compounds mentioned are, for example, octylamine, nonylamine, 15 decylamine, undecylamine, dodecylamine, tetradecylamine and the higher linear homologs; secondary amines suitable for this purpose are, for example, dioctadecylamine and methylbehenylamine. Also suitable for this purpose are amine mixtures, especially amine mixtures obtainable on the industrial scale, such as fatty amines or hydrogenated tallamines, as described, for example, in Ullmann's 20 Encyclopedia of Industrial Chemistry, 6th Edition, "Amines, aliphatic" chapter. Acids suitable for the reaction are, for example, cyclohexane-1,2-dicarboxylic acid, cyclohexene-1,2-dicarboxylic acid, cyclopentane-1,2-dicarboxylic acid, naphthalenedicarboxylic acid, phthalic acid, isophthalic acid, terephthalic acid, and succinic acids substituted by long-chain hydrocarbyl radicals. 25 More particularly, the component of class (K4) is an oil-soluble reaction product of poly(C2- to C2o-carboxylic acids) having at least one tertiary amino group with primary or secondary amines. The poly(C2- to -C20-carboxylic acids) which have at least one tertiary amino group and form the basis of this reaction product comprise preferably at 30 least 3 carboxyl groups, especially 3 to 12 and in particular 3 to 5 carboxyl groups. The carboxylic acid units in the polycarboxylic acids have preferably 2 to 10 carbon atoms, and are especially acetic acid units. The carboxylic acid units are suitably bonded to the polycarboxylic acids, usually via one or more carbon and/or nitrogen atoms. They are preferably attached to tertiary nitrogen atoms which, in the case of a plurality of 35 nitrogen atoms, are bonded via hydrocarbon chains. M/54171-PCT The component of class (K4) is preferably an oil-soluble reaction product based on poly(C2- to C20-carboxylic acids) which have at least one tertiary amino group and are of the general formula Ila or lib 5 HOOC, B 3COOH B B HOOC B'NA'N B' COOH HOOC'B B N'B COOH B' COOH (l1b) 10 in which the variable A represents a straight-chain or branched C2- to C6-alkylene group or the moiety of the formula Ill HOOC BN CH2-CH2 CH2-CH2 15 and the variable B denotes a C1- to C19-alkylene group. The compounds of the general formulae Ila and Ilb especially have the properties of a WASA. Moreover, the preferred oil-soluble reaction product of component (K4), especially that of the general formula Ila or Ilb, is an amide, an amide-ammonium salt or an 20 ammonium salt in which no, one or more carboxylic acid groups have been converted to amide groups. Straight-chain or branched C2- to C6-alkylene groups of the variable A are, for example, 1,1-ethylene, 1,2-propylene, 1,3-propylene, 1,2-butylene, 1,3-butylene, 1,4-butylene, 2 25 methyl- 1,3-propylene, 1,5-pentylene, 2-methyl-1,4-butylene, 2,2-dimethyl-1,3 propylene, 1,6-hexylene (hexamethylene) and especially 1,2-ethylene. The variable A comprises preferably 2 to 4 and especially 2 or 3 carbon atoms. C1- to C19-alkylene groups of the variable B are, for example, 1,2-ethylene, 1,3 30 propylene, 1,4-butylene, hexamethylene, octamethylene, decamethylene, dodecamethylene, tetradecamethylene, hexadecamethylene, octadecamethylene, M/54171-PCT 59 nonadecamethylene and especially methylene. The variable B comprises preferably 1 to 10 and especially 1 to 4 carbon atoms. The primary and secondary amines as a reaction partner for the polycarboxylic acids to 5 form component (K4) are typically monoamines, especially aliphatic monoamines. These primary and secondary amines may be selected from a multitude of amines which bear hydrocarbyl radicals which may optionally be bonded to one another. These parent amines of the oil-soluble reaction products of component (K4) are usually 10 secondary amines and have the general formula HN(R 8

)

2 in which the two variables R 8 are each independently straight-chain or branched C10- to C 30 -alkyl radicals, especially C14- to C 24 -alkyl radicals. These relatively long-chain alkyl radicals are preferably straight-chain or only slightly branched. In general, the secondary amines mentioned, with regard to their relatively long-chain alkyl radicals, derive from naturally occurring 15 fatty acids and from derivatives thereof. The two R 8 radicals are preferably the same. The secondary amines mentioned may be bonded to the polycarboxylic acids by means of amide structures or in the form of the ammonium salts; it is also possible for only a portion to be present as amide structures and another portion as ammonium 20 salts. Preferably only few, if any, free acid groups are present. The oil-soluble reaction products of component (K4) are preferably present completely in the form of the amide structures. Typical examples of such components (K4) are reaction products of nitrilotriacetic acid, 25 of ethylenediaminetetraacetic acid or of propylene-1,2-diaminetetraacetic acid with in each case 0.5 to 1.5 mol per carboxyl group, especially 0.8 to 1.2 mol per carboxyl group, of dioleylamine, dipalmitamine, dicocoamine, distearylamine, dibehenylamine or especially ditallowamine. A particularly preferred component (K4) is the reaction product of 1 mol of ethylenediaminetetraacetic acid and 4 mol of hydrogenated 30 ditallowamine. Further typical examples of component (K4) include the N,N-dialkylammonium salts of 2-N',N'-dialkylamidobenzoates, for example the reaction product of 1 mol of phthalic anhydride and 2 mol of ditallowamine, the latter being hydrogenated or 35 unhydrogenated, and the reaction product of 1 mol of an alkenylspirobislactone with 2 M/54171-PCT 60 mol of a dialkylamine, for example ditallowamine and/or tallowamine, the latter two being hydrogenated or unhydrogenated. Further typical structure types for the component of class (K4) are cyclic compounds 5 with tertiary amino groups or condensates of long-chain primary or secondary amines with carboxylic acid-containing polymers, as described in WO 93/18115. Sulfocarboxylic acids, sulfonic acids or derivatives thereof which are suitable as cold flow improvers of the component of class (K5) are, for example, the oil-soluble 10 carboxamides and carboxylic esters of ortho-sulfobenzoic acid, in which the sulfonic acid function is present as a sulfonate with alkyl-substituted ammonium cations, as described in EP-A 261 957. Poly(meth)acrylic esters suitable as cold flow improvers of the component of class (K6) 15 are either homo- or copolymers of acrylic and methacrylic esters. Preference is given to copolymers of at least two different (meth)acrylic esters which differ with regard to the esterified alcohol. The copolymer optionally comprises another different olefinically unsaturated monomer in copolymerized form. The weight-average molecular weight of the polymer is preferably 50 000 to 500 000. A particularly preferred polymer is a 20 copolymer of methacrylic acid and methacrylic esters of saturated C14- and C15 alcohols, the acid groups having been neutralized with hydrogenated tallamine. Suitable poly(meth)acrylic esters are described, for example, in WO 00/44857. The cold flow improver or the mixture of different cold flow improvers is added to the 25 middle distillate fuel or diesel fuel in a total amount of preferably 10 to 5000 ppm by weight, more preferably of 20 to 2000 ppm by weight, even more preferably of 50 to 1000 ppm by weight and especially of 100 to 700 ppm by weight, for example of 200 to 500 ppm by weight. 30 B4) Lubricity improvers Suitable lubricity improvers or friction modifiers are based typically on fatty acids or fatty acid esters. Typical examples are tall oil fatty acid, as described, for example, in WO 98/004656, and glyceryl monooleate. The reaction products, described in US 6 M/54171-PCT 61 743 266 B2, of natural or synthetic oils, for example triglycerides, and alkanolamines are also suitable as such lubricity improvers. B5) Corrosion inhibitors 5 Suitable corrosion inhibitors are, for example, succinic esters, in particular with polyols, fatty acid derivatives, for example oleic esters, oligomerized fatty acids, substituted ethanolamines, and products sold under the trade name RC 4801 (Rhein Chemie Mannheim, Germany) or HiTEC 536 (Afton Corporation). 10 B6) Demulsifiers Suitable demulsifiers are, for example, the alkali metal or alkaline earth metal salts of alkyl-substituted phenol- and naphthalenesulfonates and the alkali metal or alkaline 15 earth metal salts of fatty acids, and also neutral compounds such as alcohol alkoxylates, e.g. alcohol ethoxylates, phenol alkoxylates, e.g. tert-butylphenol ethoxylate or tert-pentylphenol ethoxylate, fatty acids, alkylphenols, condensation products of ethylene oxide (EO) and propylene oxide (PO), for example including in the form of EO/PO block copolymers, polyethyleneimines or else polysiloxanes. 20 B7) Dehazers Suitable dehazers are, for example, alkoxylated phenol-formaldehyde condensates, for example the products available under the trade names NALCO 7D07 (Nalco) and 25 TOLAD 2683 (Petrolite). B8) Antifoams Suitable antifoams are, for example, polyether-modified polysiloxanes, for example the 30 products available under the trade names TEGOPREN 5851 (Goldschmidt), Q 25907 (Dow Corning) and RHODOSIL (Rhone Poulenc). B9) Cetane number improvers M/54171 -PCT 62 Suitable cetane number improvers are, for example, aliphatic nitrates such as 2 ethylhexyl nitrate and cyclohexyl nitrate and peroxides such as di-tert-butyl peroxide. B10) Antioxidants 5 Suitable antioxidants are, for example, substituted phenols, such as 2,6-di-tert butylphenol and 6-di-tert-butyl-3-methylphenol, and also phenylenediamines such as N,N'-di-sec-butyl-p-phenylenediamine. 10 B 11) Metal deactivators Suitable metal deactivators are, for example, salicylic acid derivatives such as N,N' disalicylidene-1,2-propanediamine. 15 B12) Solvents Suitable solvents are, for example, nonpolar organic solvents such as aromatic and aliphatic hydrocarbons, for example toluene, xylenes, white spirit and products sold under the trade names SHELLSOL (Royal Dutch/Shell Group) and EXXSOL 20 (ExxonMobil), and also polar organic solvents, for example, alcohols such as 2 ethylhexanol, decanol and isotridecanol. Such solvents are usually added to the diesel fuel together with the aforementioned additives and coadditives, which they are intended to dissolve or dilute for better handling. 25 B13) Auxiliaries to counteract deposits in injectors In a further preferred embodiment of the invention, the compounds of the invention are combined with further auxiliaries to counteract internal and external deposits in injectors in diesel engines. 30 These may preferably be olefin-polymerizable carboxylic acid copolymers, where the copolymer comprises at least one free carboxylic acid side group, or a nitrogen compound quaternized with epoxide in the presence of an olefin-polymerizable carboxylic acid copolymer, where the copolymer comprises at least one free carboxylic M/54171-PCT 63 acid side group, where the polymerizable carboxylic acid is a polymerizable mono- or polycarboxylic acid. In addition, they may be copolymers, copolymer-containing reaction products or a 5 copolymer-containing component fraction thereof, where the copolymer is obtainable by (1) copolymerizing a) at least one ethylenically unsaturated, polymerizable polycarboxylic anhydride with b) at least one polymerizable olefin; (2) then derivatizing the copolymer from step (1) by partial or complete reaction of the 10 anhydride radicals of the copolymer from step (1) with water, at least one hydroxyl compound, at least one primary or secondary amine; or mixtures thereof, to form a carboxyl-containing copolymer derivative; and optionally (3) quaternizing a quaternizable (especially tertiary) nitrogen compound with an epoxide and the copolymer derivative from step (2). 15 In addition, they may be copolymers, copolymer-containing reaction products or a copolymer-containing component fraction thereof, where the copolymer is obtainable by (1) copolymerizing 20 a) at least one ethylenically unsaturated, polymerizable mono- or polycarboxylic acid with b) at least one polymerizable olefin; (2) then derivatizing the copolymer from step (1) by partial reaction of the carboxyl radicals of the copolymer with at least one hydroxyl compound, at least one primary or 25 secondary amine; or mixtures thereof, to form a copolymer derivative having a reduced content of free carboxyl groups; and optionally (3) quaternizing a quaternizable nitrogen compound with an epoxide and the copolymer derivative from step (2). 30 In addition, they may be copolymers, copolymer-containing reaction products or a copolymer-containing component fraction thereof, where the copolymer is obtainable by (1) copolymerizing a) at least one ethylenically unsaturated, polymerizable mono- or polycarboxylic acid 35 with M/54171-PCT 64 b) at least one polymerizable olefin and optionally (2) quaternizing a quaternizable nitrogen compound with an epoxide and the hydrolysis product from step (1). 5 Copolymer compounds of this kind are described, for example, in European patent application EP application number 14152991.7 to the present applicant. C) Fuels 10 The inventive additive is outstandingly suitable as a fuel additive and can be used in principle in any fuels. It brings about a whole series of advantageous effects in the operation of internal combustion engines with fuels. Preference is given to using the inventive quaternized additive in middle distillate fuels, especially diesel fuels. 15 The present invention therefore also provides fuels, especially middle distillate fuels, with a content of the inventive quaternized additive which is effective as an additive for achieving advantageous effects in the operation of internal combustion engines, for example of diesel engines, especially of direct injection diesel engines, in particular of diesel engines with common rail injection systems. This effective content (dosage) is 20 generally 10 to 5000 ppm by weight, preferably 20 to 1500 ppm by weight, especially 25 to 1000 ppm by weight, in particular 30 to 750 ppm by weight, based in each case on the total amount of fuel. Middle distillate fuels such as diesel fuels or heating oils are preferably mineral oil 25 raffinates which typically have a boiling range from 100 to 4000C. These are usually distillates having a 95% point up to 3600C or even higher. These may also be what is called "ultra low sulfur diesel" or "city diesel", characterized by a 95% point of, for example, not more than 3450C and a sulfur content of not more than 0.005% by weight or by a 95% point of, for example, 2850C and a sulfur content of not more than 0.001 % 30 by weight. In addition to the mineral middle distillate fuels or diesel fuels obtainable by refining, those obtainable by coal gasification or gas liquefaction ["gas to liquid" (GTL) fuels] or by biomass liquefaction ["biomass to liquid" (BTL) fuels] are also suitable. Also suitable are mixtures of the aforementioned middle distillate fuels or diesel fuels with renewable fuels, such as biodiesel or bioethanol. Also conceivable are hydrogenated 35 vegetable oils (HVO) or used kitchen oil (UKO). M/54171-PCT 65 The qualities of the heating oils and diesel fuels are laid down in detail, for example, in DIN 51603 and EN 590 (cf. also Ullmann's Encyclopedia of Industrial Chemistry, 5th edition, Volume A12, p. 617 ff.). 5 In addition to the use thereof in the abovementioned middle distillate fuels of fossil, vegetable or animal origin, which are essentially hydrocarbon mixtures, the inventive quaternized additive can also be used in mixtures of such middle distillates with biofuel oils (biodiesel). Such mixtures are also encompassed by the term "middle distillate fuel" in the context of the present invention. They are commercially available and usually 10 comprise the biofuel oils in minor amounts, typically in amounts of 1 to 30% by weight, especially of 3 to 10% by weight, based on the total amount of middle distillate of fossil, vegetable or animal origin and biofuel oil. Biofuel oils are generally based on fatty acid esters, preferably essentially on alkyl 15 esters of fatty acids which derive from vegetable and/or animal oils and/or fats. Alkyl esters are typically understood to mean lower alkyl esters, especially C- to C 4 -alkyl esters, which are obtainable by transesterifying the glycerides which occur in vegetable and/or animal oils and/or fats, especially triglycerides, by means of lower alcohols, for example ethanol or in particular methanol ("FAME"). Typical lower alkyl esters based 20 on vegetable and/or animal oils and/or fats, which find use as a biofuel oil or components thereof, are, for example, sunflower methyl ester, palm oil methyl ester ("PME"), soya oil methyl ester ("SME") and especially rapeseed oil methyl ester ("RME"). Also conceivable are hydrogenated vegetable oils (HVO) or used kitchen oil (UKO). 25 The middle distillate fuels or diesel fuels are more preferably those having a low sulfur content, i.e. having a sulfur content of less than 0.05% by weight, preferably of less than 0.02% by weight, more particularly of less than 0.005% by weight and especially of less than 0.001% by weight of sulfur. 30 Useful gasoline fuels include all commercial gasoline fuel compositions. One typical representative which shall be mentioned here is the Eurosuper base fuel to EN 228, which is customary on the market. In addition, gasoline fuel compositions of the specification according to WO 00/47698 are also possible fields of use for the present 35 invention. M/54171 -PCT 66 The inventive quaternized additive is especially suitable as a fuel additive in fuel compositions, especially in diesel fuels, for overcoming the problems outlined at the outset in direct injection diesel engines, in particular in those with common rail injection 5 systems. Preferred additives in fuels of this kind are the following specific compound classes (A) and (C): 10 Preferred additives (A) are compounds which are derived from succinic anhydride and have long-chain hydrocarbyl radicals having generally 15 to 700 and particularly 30 to 200 carbon atoms. These compounds may have further functional groups which are preferably selected from hydroxyl, amino, amido and/or imido groups. Preferred additives are the corresponding derivatives of polyalkenylsuccinic anhydride, which are 15 obtainable, for example, by reaction of polyalkenes with maleic anhydride by a thermal route or via the chlorinated hydrocarbons. The number-average molecular weight of the long-chain hydrocarbyl radicals is preferably within a range from about 200 to 10 000, more preferably 400 to 5000, particularly 600 to 3000 and especially 650 to 2000. These long-chain hydrocarbyl radicals preferably derive from conventional 20 polyisobutenes and especially from the aforementioned reactive polyisobutenes. Of particular interest as additives (A) are the derivatives of polyalkenylsuccinic anhydrides with ammonia, monoamines, polyamines, monoalcohols and polyols. Polyamines preferred for derivatization comprise ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, propylenediamine, etc. Suitable alcohols 25 comprise monohydric alcohols, such as ethanol, allyl alcohol, dodecanol and benzyl alcohol, polyhydric alcohols, such as ethylene glycol, diethylene glycol, propylene glycol, 1,2-butanediol, neopentyl glycol, glycerol, trimethylolpropane, erythritol, pentaerythritol, mannitol and sorbitol. 30 Succinic anhydride derivatives (A) suitable as additives are described, for example, in US 3 522 179, US 4234435, US 4849 572, US 4904401, US 5569644 and US 6 165 235, which are fully incorporated by reference. Preferred additives (C) are Mannich adducts. Such adducts are obtained in principle by 35 Mannich reaction of aromatic hydroxyl compounds, especially phenol and phenol M/54171-PCT 67 derivatives, with aldehydes and mono- or polyamines. These are preferably the reaction products of polyisobutene-substituted phenols with formaldehyde and mono or polyamines such as ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, dimethylaminopropylamine, etc. Suitable Mannich adducts 5 and processes for preparation thereof are described, for example, in US 5 876 468, EP-A 831 141, EP-A 1 233 990 and EP-A 1 226 188, which are fully incorporated by reference. The additives (A) and (C) and any further additives from those mentioned above may 10 typically each be present in amounts of in each case 0.0001 to 1% by weight, preferably 0.001 to 0.6% by weight and especially 0.0015 to 0.4% by weight, based on the total amount of the fuel composition. The invention is now illustrated in detail by the working examples which follow: More 15 particularly, the test methods specified hereinafter are part of the general disclosure of the application and are not restricted to the specific working examples. Experimental: 20 A. General test methods Engine test 1. XUD9 test - determination of flow restriction 25 The procedure is according to the standard provisions of CEC F-23-1-01. 2. DW1 0 test - determination of power loss as a result of injector deposits in the common rail diesel engine 30 2.1. DW10-KC - keep-clean test The keep-clean test is based on CEC test procedure F-098-08 Issue 5. This is done using the same test setup and engine type (PEUGEOT DW10 ) as in the CEC procedure. 35 M/54171-PCT 68 Change and special features: In the tests, cleaned injectors were used. The cleaning time in the ultrasound bath in water + 10% Superdecontamine (Intersciences, Brussels) at 600C was 4 h. 5 Test run times: The test run time, unless stated otherwise, was 12 h without shutdown phases. The one-hour test cycle from CEC F-098-08, shown in figure 1, was run through 12 times. Performance determination (unless stated otherwise): 10 The initial power PO,KC [kW] is calculated from the measured torque at full load 4000/min directly after the test has started and the engine has run hot. The procedure is described in Issue 5 of the test procedure (CEC F-98-08). This is done using the same test setup and the PEUGEOT DWI0 engine type. 15 The final performance (Pend,KC) is determined in the 12th cycle in stage 12 (see table, figure 2). Here too, the operation point is full load 4000/min. Pend,KC [kW] is calculated from the torque measured. The power loss in the KC test is calculated as follows: 20 PowerlassKC %]= _ PmdKC, 10 2.2. DWI0 dirty-up clean-up (DU-CU) The DU-CU test is based on CEC test procedure F-098-08 Issue 5. The procedure is 25 described in Issue 5 of the test procedure (CEC F-98-08). This is done using the same test setup and the PEUGEOT DW1 0 engine type. The DU - CU test consists of two individual tests which are run in succession. The first test serves to form deposits (DU), the second to remove the deposits (CU). After the 30 DU, the power loss is determined. After the end of the DU run, the engine is not operated for at least 8 hours and is cooled to ambient temperature. Thereafter, the CU fuel is used to start the CU without deinstalling and cleaning the injectors. The deposits and power loss ideally decline over the course of the CU test. 35 Alteration and special features: M/54171-PCT 69 Cleaned injectors were installed in the engine prior to each DU test. The cleaning time in the ultrasound bath at 600C, in water + 10% Superdecontamine (Intersciences, Brussels), was 4 h. 5 Test run times (unless stated otherwise): The test run time was 4.28 h for the DU and 8 h or 12 h for the CU. The engine was operated in the DU and CU tests without shutdown phases. The one-hour test cycle from CEC F-098-08, shown in figure 1, was run through 12 10 times in each case. In some DU tests, an accelerated procedure was employed. For this purpose, no test cycle from CEC F-098-08 was run; instead, the engine was operated at 4000/min full load with an elevated amount of Zn (3 ppm rather than 1 ppm in the CEC F-098-08 15 procedure). Performance determination: The initial power PO,du [kW] is calculated from the measured torque at full load 4000/min directly after the test has started and the engine has run hot. The procedure 20 is likewise described in Issue 5 of the test procedure. The final performance (Pend,du) is determined in the 12th cycle in stage 12 (see table above). Here too, the operation point is full load 4000/min. Pend,du [kW] is calculated from the torque measured. 25 The power loss in the DU is calculated as follows: Powerlossdu [%] (1- Pen*f 4 u 100 30 Clean-up The initial power PO,cu [kW] is calculated from the measured torque at full load 4000/min directly after the test has started and the engine has run hot in the CU. The procedure is likewise described in Issue 5 of the test procedure. M/54171 -PCT 70 The final performance (Pend,cu) is determined in the 12th cycle in stage 12 (see table, figure 2). Here too, the operation point is full load 4000/min. Pend,cu [kW] is calculated from the torque measured. 5 The power loss in the CU test is calculated as follows (negative number for the power loss in the cu test means an increase in performance) POWwr1OSS(DUXJ)f[%] Red du - ) Pen" 00 ROa, Ct. 10 The fuel used was a commercial diesel fuel from Haltermann (RF-06-03). To artificially induce the formation of deposits at the injectors, 1 ppm by weight of zinc in the form of a zinc didodecanoate solution was added thereto. 3. IDID test - determination of additive effect on intemal injector deposits 15 The formation of deposits within the injector was characterized by the deviations in the exhaust gas temperatures of the cylinders at the cylinder outlet on cold starting of the DWI0 engine. 20 To promote the formation of deposits, 1 mg/ of Na in the form of a salt of an organic acid (sodium naphthenate), 20 mg/I of dodecenylsuccinic acid and 10 mg/I of water were added to the fuel. The test is conducted as a dirty-up clean-up test (DU-CU). 25 DU-CU is based on CEC test procedure F-098-08 Issue 5. The DU - CU test consists of two individual tests which are run in succession. The first test serves to form deposits (DU), the second to remove the deposits (CU). 30 After the DU run, after a rest phase of at least eight hours, a cold start of the engine is conducted, followed by idling for 10 minutes. Thereafter, the CU fuel is used to start the CU without deinstalling and cleaning the 35 injectors. After the CU run over 8 h, after a rest phase of at least eight hours, a cold M/54171 -PCT 71 start of the engine is conducted, followed by idling for 10 minutes. The evaluation is effected by the comparison of the temperature profiles for the individual cylinders after the cold start in the DU and CU runs. 5 The IDID test indicates the formation of internal deposits in the injector. The characteristic used in this test is the exhaust gas temperature of the individual cylinders. In an injector system without IDIDs, the exhaust gas temperatures of the cylinders increase homogeneously. In the presence of IDIDs, the exhaust gas temperatures of the individual cylinders do not increase homogeneously and deviate 10 from one another. The temperature sensors are beyond the cylinder head outlet in the exhaust gas manifold. Significant deviation of the individual cylinder temperatures (e.g. > 20*C) indicates the presence of internal injector deposits (IDIDs). 15 The tests (DU and CU) are each conducted with run time 8 h. The one-hour test cycle from CEC F-098-08 (see figure 3) is run through 8 times in each case. In the event of deviations of the individual cylinder temperatures of greater than 450C from the mean for all 4 cylinders, the test is stopped early. 20 Alteration and special features: Cleaned injectors were installed before the start of each DU test run. The cleaning time in the ultrasound bath at 600C, in water + 10% Superdecontamine, was 4 h. 25 B. Preparation examples: Preparation examples 1 to 4: Quaternization of tertiary fatty amines with propylene oxide in the presence of various hydrocarbyl-substituted succinic acids 0 OH 1 OH+ N R1 O H + R4"'N, 'R3 + _, R5 (1) (3) (4) 30 M/54171-PCT 72 R5R R3-2 OH or R-2 OH 0 R 3 -NR 5 R 1 N' R (2a) (2b)

R

1 here represents long-chain hydrocarbyl; R 2 , R 3 and R 4 correspond to Ra, Rb and R, as defined above; R 5 corresponds to Rd as defined above; and R is H or a radical obtained by esterification with the epoxide, for example -CH 2

CH(R

5 )OH 5 a) Reagents used: Polyisobutylenesuccinic anhydride (PIBSA, Glissopal@ SA, from BASF): Prepared from maleic anhydride and Polyisobutene 1000 in a known manner. Unless stated otherwise, for the inventive preparation examples, qualities having a 10 bismaleation level of 10% to 20% and hydrolysis numbers in the range of 84-95 mg KOH/g were used. For preparation of polyisobutylenesuccinic acid, polyisobutylenesuccinic anhydride was admixed with the equimolar amount of water in accordance with the hydrolysis number and hydrolyzed at a temperature of 800C. For example, the reaction of polyisobutylenesuccinic anhydride (hydrolysis number 15 85.6 mg KOH/g) after a reaction time of 4 h at 800C gave a reaction product which had an acid number of 83.9 mg KOH/g. The formation of the polyisobutylenesuccinic acid was confirmed by IR spectroscopy (1711 cm- 1 ). In an analogous manner, tetrapropenylsuccinic anhydride (CAS 26544-38-7) and a 20 mixed i-hexadecenyl/i-octadecenylsuccinic anhydride (CAS 32072-96-1 and 28777-98 2) from Pentagon were hydrolyzed to the corresponding succinic acid derivatives. Cocoyldimethylamine: (N,N-dimethyl-N-C12/14-amine, CAS 68439-70-3 and 112-18-5) having a total amine value of 246 mg KOH/g. 25 N-Methyl-N,N-ditallowamine: Armeen@ M2HT from Akzo Nobel, CAS 61788-63-4, having a total amine value of 108 mg KOH/g. In addition, the following were used: 30 N,N-Dimethylhexadecylamine (n-C 1 6

H

33 NMe 2 , CAS 112-69-6, Aldrich) Tridecylamine (branched; isomer mixture, CAS 86089-17-0) from BASF. M/54171-PCT 73 N,N-Dimethyl-1,3-diaminopropane (DMAPA, CAS 109-55-7) from BASF. 2-Ethylhexanol and 2-propylheptanol from BASF. 5 Solvent Naphtha naphthalene depleted (ND): SolvessoTm 150 ND from Exxon Mobil. b) General synthesis method 10 A 2 I autoclave is initially charged with a solution of the tertiary amine (1 eq. according to the total amine number) and of the alkylenesuccinic acid derivative (1 eq. according to the acid number) in the given solvent (2-ethylhexanol, unless stated otherwise). The amount of solvent and the batch size are selected such that the end product has an active content of 50% and the reactor a fill level of about 70%. This is followed by 15 purging three times with N 2 , establishment of a supply pressure of approx. 2 bar of N 2 and an increase in the temperature to 500C. The given alkylene oxide, propylene oxide unless stated otherwise, (2 eq.) is metered in within 1 h. This is followed by stirring at 500C for 15 h, cooling to 250C, purging with N 2 and emptying of the reactor. The product is transferred into a 2 I jacketed reactor and excess alkylene oxide is removed 20 by introducing an N 2 stream (10 I/h) under reduced pressure (70 mbar) at 500C for 6 h. 1 H NMR (CDCl 3 ) confirms the quaternization (6 = 3.3 ppm, singlet, R 2

N(CH

3

)

2 or

R

3

NCH

3 ). c) Experiments conducted 25 Following the above synthesis method, the following quaternizations with propylene oxide were conducted: Preparation Tertiary amine Hydrocarbyl-substituted succinic acid example 1 cocoyldimethylamine polyisobutylenesuccinic acid 2 cocoyldimethylamine tetrapropenylsuccinic acid 3 cocoyldimethylamine i-hexadecenyl/i-octadecenylsuccinic acid 4 N-methyl-N,N-ditallowamine tetrapropenylsuccinic acid M/54171-PCT 74 6 n-C 16

H

33 NMe 2 polyisobutylenesuccinic acid 7 n-C 1 6

H

33 NMe 2 polyisobutylenesuccinic acid 8 n-C16H 33 NMe 2 polyisobutylenesuccinic acid 9 n-C 16

H

33 NMe 2 polyisobutylenesuccinic acid 10 n-C 1 6

H

33 NMe 2 polyisobutylenesuccinic acid 11 n-C 1 6

H

33 NMe 2 polyisobutylenesuccinic acid 12 n-C 1 6

H

33 NMe 2 polyisobutylenesuccinic acid 13 cocoyldimethylamine polyisobutylenesuccinic acid 16 N,N-dimethylethanol- tetrapropenylsuccinic acid amine*15 PO 17 PIBSA-DMAPA succinimide tetrapropenylsuccinic acid Remarks relating to preparation examples: No. 7: 2-Propylheptanol was used in place of 2-ethylhexanol as solvent. No. 8: 2-Ethylhexanol/Solvent Naphtha ND 1:1 (w/w) was used in place of 2 5 ethylhexanol as solvent. No. 9: Ethylene oxide (1.5 eq.) was used in place of propylene oxide. 2 Propylheptanol was used in place of 2-ethylhexanol as solvent. No. 10: The PIBSA used (made from maleic anhydride and polyisobutene 1000) had a bismaleation level of 32% and a hydrolysis number of 112.5 mg KOH/g. 10 No. 11: 1.5 eq. of propylene oxide were used. No. 12: 1.1 eq. of propylene oxide were used. No. 13: 2-Propylheptanol was used in place of 2-ethylhexanol as solvent. The PIBSA used (made from maleic anhydride and polyisobutene 550) had a hydrolysis number of 142.5 mg KOH/g. 15 No. 16: 2-Propylheptanol was used as solvent; the amine used was a polyether amine obtained by 15-tuple propoxylation of N,N-dimethylethanolamine (for preparation see synthesis example 1 of WO 2013/064689 Al). No. 17: 2-Propylheptanol was used as solvent; the amine used was the condensation product of polyisobutylenesuccinic acid (PIBSA) and DMAPA; see preparation 20 example 1 of WO 2013/000997 Al. Preparation example 5: Quaternization of triethylamine with dodecene oxide in the presence of tetrapropenylsuccinic acids M/54171-PCT 75 Reagents: dodecene oxide (CAS 2855-19-8) from Aldrich, trimethylamine (anhydrous, CAS 75-50-3) from BASF 5 An N 2 -inertized 2 1 autoclave is initially charged with a solution of trimethylamine (47.2 g, 0.8 mol) and dodecene oxide (147.2 g, 0.8 mol) in 2-ethylhexanol (194.4 g). Subsequently, the temperature is increased to 40*C. A solution of tetrapropenylsuccinic acid (252.8 g, 0.8 mol) in 2-ethylhexanol (252.8 g) is metered in within 1.5 h. This is followed by stirring at 400C for 15 h. Volatile constituents are removed by introducing 10 an N 2 stream at 400C, then the reactor is emptied. 1 H NMR (CDCl 3 ) confirms the quaternization (6 = 3.3 ppm, singlet, RN(CH 3

)

3 ). Preparation example 14: Synthesis of iC 13 NMe 2 15 Tridecylamine (140.2 g) is initially charged at room temperature and formic acid (166.7 g) is added while stirring within 15 min. The reaction mixture is heated to 45*C and aqueous formaldehyde solution (37%; 132.7 g) is added dropwise with evolution of C02 within 25 min. Subsequently, stirring is continued at 800C for 23 h. After cooling to room temperature, hydrochloric acid (32%; 121.5 g) is added while stirring. The mixture 20 is stirred at room temperature for 3 h and the water is removed on a rotary evaporator under reduced pressure. 500 mL of water are added to the product mixture, and 50% sodium hydroxide solution is used to release the amine. The mixture was extracted twice with methyl tert-butyl ether, the combined organic phases were dried over sodium sulfate and the solvent was removed on a rotary evaporator. The product (143.5 g) 25 exhibited a total amine number of 228 mg KOH/g with 94% tertiary amine. Preparation example 15: Quatemization of iC 13 NMe 2 with propylene oxide/tetrapropenylsuccinic acid 30 According to the general synthesis method, iC 13 NMe 2 (preparation example 14), tetrapropenylsuccinic acid and propylene oxide were converted in 2-propylheptanol rather than 2-ethylhexanol. Comparative example 1: Inventive Example 3 of GB 2496514 35 M/54171-PCT Dimethyloctadecyl(2-hydroxyhexyl)ammonium acetate wird is obtained by quaternizing n-C 18

H

37 NMe 2 with hexene oxide/acetic acid. In contrast to all the inventive examples, this product as a 50% solution in 2-ethylhexanol turns cloudy when stored at room temperature over a period of 1 week. 5 Comparative example 2: Quatemization of cocoyldimethylamine with propylene oxide/oleic acid Analogously to the general synthesis method, a 2 L autoclave is initially charged with a 10 solution of cocoyldimethylamine (1 eq.) and oleic acid (1 eq.) in 2-ethylhexanol. The amount of 2-ethylhexanol and the batch size are chosen such that the end product has an active content of 50% and the reactor a fill level of about 70%. This is followed by purging three times with N 2 , establishment of a supply pressure of about 2 bar of N 2 and an increase in the temperature to 50 0 C. Propylene oxide (2 eq.) is metered in 15 within 1 h. This is followed by stirring at 50*C for a further 15 h, cooling to 250C, purging with N 2 and emptying of the reactor. The product is transferred into a 2 L jacketed reactor and excess propylene oxide is removed by introducing an N 2 stream (10 I/h) under reduced pressure (70 mbar) at 500C for 6 h. 20 Comparative example 3: Quatemization of cocoyldimethylamine with propylene oxide/oleic acid Analogously to the general synthesis method, a 2 L autoclave is initially charged with a solution of cocoyldimethylamine (1 eq.) and oleic acid (2 eq.) in 2-ethylhexanol. The 25 amount of 2-ethylhexanol and the batch size are chosen such that the end product has an active content of 50% and the reactor a fill level of about 70%. This is followed by purging three times with N 2 , establishment of a supply pressure of about 2 bar of N 2 and an increase in the temperature to 50*C. Propylene oxide (2 eq.) is metered in within 1 h. This is followed by stirring at 50*C for a further 15 h, cooling to 250C, 30 purging with N 2 and emptying of the reactor. The product is transferred into a 2 L jacketed reactor and excess propylene oxide is removed by introducing an N 2 stream (10 I/h) under reduced pressure (70 mbar) at 50*C for 6 h. Analysis example 1 35 M/54171-PCT 77 a) Determination of the quatemization level: Quaternization levels are determined by 1 H NMR spectroscopy. For this purpose, the corresponding solvent is removed with a Kugelrohr still (60*C, p = 10-3 mbar, 3 h). To 5 determine the quaternization level, the alkyl moiety is integrated against the signals of the quaternized product RCH 2 NMe 2

CH

2 CH(OH)R'. The quotients from the integrals of the signals of the quaternized product and the corresponding theoretical values multiplied by 100% give the quaternization level. The values for the different signals are averaged. Residues of solvent (doublet at 5 = 3.55 ppm for HOCH 2 CHRR') are taken 10 into account. No. Synthesis according to Quaternization level [%] 1 comparative example 1 71 2 comparative example 2 59 3 preparation example 1 99 4 preparation example 3 92 5 preparation example 7 99 6 preparation example 8 90 7 preparation example 11 85 8 comparative example 3 79 The 1 H NMR spectrum of comparative example 2 additionally exhibits a signal at 6 = 3.98 ppm (dd, J = 1.0, 6.0 Hz), which suggests ester formation. Integration of the signal shows the formation of 29% of the esterification product from oleic acid and propylene 15 oxide. A signal at 6 = 2.21 ppm (s) suggests unreacted cocoyldimethylamine. The process of the invention for quaternization of tertiary fatty amines with alkylene oxides in the presence of alkylidenesuccinic acids surprisingly gives much higher quaternization levels than the comparative examples in which monocarboxylic acids 20 such as acetic acid or oleic acid are used. b) Thermogravimetry For the thermogravimetry analysis, the corresponding solvent was removed with a 25 Kugelrohr still (60-70'C, p = 10-3 mbar, 3 h). Thermogravimetry was measured from M/54171-PCT 78 300C to 900*C with a temperature rise of 20*C/min. under a nitrogen atmosphere at a flow rate of 60mL/min. The following changes in mass (TG) at 350*C were determined: No. Synthesis according to Change in mass (TG) at 3500C 1 preparation example 1 17% 2 preparation example 7 34% 5 C. Use examples: In the use examples which follow, the additives are used either as a pure substance (as synthesized in the above preparation examples) or in the form of an additive 10 package. Use example 1: Determination of additive action on the formation of deposits in diesel engine injection nozzles 15 DW1 0 test to CEC F-098-08 Fuel: summer diesel, no performance additives in accordance with EN 590 B7 Part 1: Dirty up (DU) 20 Zn content in the fuel: 3 mg/kg, Duration: 12 hours, non-stop Power (t = 0 h) = 98.2 kW (at start of test) 25 Power (t = 12 h) = 89.9 kW (at end of DU) Power loss (t = 12 h) = 8.5% Part 2: Clean up (CU) 30 Zn content in the fuel: 1 mg/kg, Duration: 6 hours, non-stop Additive: 50 ppm of active constituent of additive according to preparation example 2 M/54171-PCT 79 Power (t = 0 h) = 89.2 kW (at start of test) Power (t = 6 h) = 97.5 kW (at end of CU) Based on the starting power value (98.2 kW), a rise in the power from 90.8% to 99.3% 5 is observed after 6 hours. All figures are based on ppm by weight (mg/kg), unless stated otherwise. Use example 2: DW1 0 Zn engine test (clean up) 10 The test was conducted with a Peugeot DW10 engine which is used according to the standard CEC F-98-08 procedure, except modified by more severe conditions in the dirty-up part and a run under full load rather than the CEC F-98-08 procedure. The test consisted of two parts: 15 1, Dirty up: The more severe conditions allow much quicker formation of injector deposits and hence a quicker power loss determination than under standard CEC F-98-08 conditions: the engine was run for 4.28 h under full load (4000 rpm) with base fuel 20 according to EN590 B7, without performance additives, containing 3 mg/kg Zn. The results are compiled in the table which follows. Power loss in the DU is calculated as follows: 25 Powerlossdu[%]= (1- pfndu 1 0 0 II. Clean up: For the clean up test shortened to 8 h according to the CEC F-98-08 procedure with 30 1 ppm of Zn in the form of a zinc didodecanoate solution and base fuel according to EN590 B7 fuel, without performance additives, comprising inventive additions, the results summarized in the table below were achieved. Power loss in the CU test is calculated as follows (negative number for power loss in 35 the CU test means performance increase) M/54171-PCT 80 POWMAio9s (DOU)[1%] =~10 Test Addition Power before Power after test, Power loss, test, kW kW % Dirty up 3 ppm of Zn 98.3 92.9 5.5 (accelerated method), full load Clean up, 8 1 ppm of Zn and 93.0 96.4 -3.6 hours, shortened 33 ppm of sample method according to according to CEC preparation F-98-08 example 1 Dirty up 3 ppm of Zn 94.8 90.5 4.5 (accelerated method), full load Clean up, 8 1 ppm of Zn and 90.0 93.3 -3.0 hours, shortened 48 ppm of sample method according to according to CEC preparation F-98-08 example 7 Dirty up 3 ppm of Zn 94.7 90.8 4.1 (accelerated method), full load Clean up, 8 1 ppm of Zn and 90.4 94.5 -3.9 hours, shortened 60 ppm of sample method according to according to CEC preparation F-98-08 example 7 Dirty up 3 ppm of Zn 93.8 90.2 3.8 (accelerated method), full load Clean up, 8 1 ppm of Zn and 91.8 94.6 -4.7 hours, shortened 60 ppm of sample method according to according to CEC preparation F-98-08 example 13 5 The compounds described in accordance with the invention are effective against the formation of deposits in direct injection engines such as Peugeot DW1 0, when tested in accordance with CEC F-98-08, and are capable of removing the deposits formed at an earlier stage. M/54171-PCT Use example 3: XUD9 engine test (keep clean) The test was conducted according to the standard procedure CEC F-023-01 with a Peugeot engine XUD9 with diesel base fuel according to EN590 B7, without performance additives. 5 Addition Reduction in flow with needle stroke 0.1 mm, % No addition 76.8 20 ppm of sample according to preparation example 1 67.3 100 ppm of sample according to preparation example 1 19.5 24 ppm of sample according to preparation example 3 46.7 36 ppm of sample according to preparation example 3 24.0 36 ppm of sample according to preparation example 7 46.8 24 ppm of sample according to preparation example 6 52.0 The compounds described by the invention are effective against the formation of deposits in indirect injection engines such as Peugeot XUD9, when tested in accordance with CEC F-023-01, and are capable of removing the deposits formed at 10 an earlier stage. Use example 4: CFPP EN 116 test The test was conducted according to the DIN EN 116 standard method for determining 15 the cold flow characteristics (cold flow filter plugging point, CFPP) with winter diesel base fuel according to EN590 B7, without performance additives. M/54171 -PCT 82 Addition CFPP temperature according to EN 116, *C No addition -27 40 ppm of sample according to preparation example 1 -28 80 ppm of sample according to preparation example 1 -26 40 ppm of sample according to preparation example 3 -27 120 ppm of sample according to preparation example 3 -26 70 ppm of sample according to preparation example 7 -29 80 ppm of sample according to comparative example 1 -22 The compounds described in this invention do not cause a deterioration in the cold flow properties nor any deterioration in the CFPP measured according to the EN116 5 standard. Use example 5: Motor oil compatibility The test was conducted in accordance with standard DGMK 531 1-A with base fuel according to EN590 B7 without performance additives and Wintershall Multi-Rekord 10 Top 15W-40 motor oil. The product to be tested was mixed with motor oil and heated to 90*C for 3 days. This was followed by cooling and dilution with diesel fuel to a volume of 500 ml. Then the mixture was filtered through a filter described in the method. A filtration time exceeding 120 seconds was regarded as a fail. Addition in the test Filtration time, s Pass/fail 50% solution of sample according to 105 Pass preparation example 1 in ethylhexanol 50% solution of sample according to 120 Pass preparation example 3 in propylheptanol 50% solution of specimen according to >300 Fail, filter blocked comparative example 1 15 M/54171-PCT The compounds described by the invention do not cause any deterioration in motor oil compatibility measured by the DGMK 531 1-A standard and do not lead to any deterioration in motor oil properties. 5 Use example 6: Corrosion test to ASTM D665B (modified) The test was conducted according to standard ASTM D665 B (modified) with water (synthetic seawater) in a mixture with diesel base fuel according to EN590 B7, without performance additives. 10 The modifications were that the temperature was 600C and the duration of the test was 4 hours. The test was evaluated by the NACE assessment. Fuels both with and without additives were examined. The results are listed in the table below. 15 A 100% rust-free B++ 0.1% or less of the total surface rusted B+ 0.1% - 5% of the total surface rusted B 5% - 25% of the total surface rusted C 25% - 50% of the total surface rusted D 50% - 75% of the total surface rusted E 75% - 100% of the total surface rusted M/54171-PCT Addition Rating in the ASTM D665B test (with artificial seawater) No additions E 70 ppm of sample according to preparation example 3 A 70 ppm of sample according to preparation example 1 A 70 ppm of sample according to preparation example 6 A 70 ppm of sample according to preparation example 7 A The compounds described by the invention show very significant anticorrosive action, as shown by ASTM D 665 B (using synthetic seawater). 5 Use example 7: DW1 0 Zn engine test (keep clean) The test was conducted with a Peugeot DW10 engine, by the standard 44-hour CEC F-98-08 procedure. In the tests, a base fuel according to EN590 B7 was used, without performance additives. Fuels both with and without additions were examined. The 10 results are compiled in the table below. Additions Power loss after test, % I ppm of Zn 4.3 1 ppm of Zn und 36 ppm of sample 0 according to preparation example 7 The compounds described in this invention are effective against the formation of deposits in direct injection engines such as the Peugeot DW10 as used in the test 15 procedure according to CEC F-98-08 and are capable of removing deposits formed beforehand. Use example 8: HFRR DIN ISO 12156-1 lubricity test 20 The test was conducted to the standard DIN ISO 12156-1 test for determination of the lubricity of diesel fuels. The fuel was tested with and without additions. In the measurement, abrasion was determined. The higher the abrasion, the poorer the lubricity properties of the fuel. Coryton BO fuel having low lubricity was used in this test. M/54171-PCT Addition HFRR abrasion according to DIN ISO 12156-1 test, pm No addition 518 70 ppm of sample according to 365 preparation example 1 The compounds described in accordance with the invention can improve lubricity of diesel fuels and prevent malfunction of fuel pumps as measured in the DIN ISO 12156 5 1 test. Use example 9: DW1 0 Na soap IDID test (clean up) To examine the influence of the additives on the performance of direct injection diesel 10 engines, as a further test method, the IDID engine test, in which the exhaust gas temperatures in the cylinders at the cylinder outlet were determined on cold starting of the DW10 engine. A direct injection diesel engine with common rail system from the manufacturer Peugeot as per test method CEC F-098-08 was used. The fuel used was a commercial B7 diesel fuel according to EN 590. To artificially induce the formation of 15 deposits, 1 mg/L of Na in the form of sodium naphthenate and 20 mg/L of dodecenylsuccinic acid were added in each case. Similarly to the CEC F-98-08 method, the engine power is measured during the test. 20 The test consisted of two parts: 1. Dirty-up: The test was conducted without addition of compounds according to this invention. The 25 test was shortened to 8 hours; the CEC F-98-08 method was conducted without addition of Zn, but with addition of sodium naphthenate and dodecylsuccinic acid (DDS). If significant deviations in exhaust gas temperatures were observed, the test was stopped before the 8-hour mark was reached, in order to avoid engine damage. After the dirty-up run, the engine was left to cool and then restarted and operated in M/54171-PCT tUb idling mode for 5 minutes. During these 5 minutes, the engine was warmed up. The exhaust gas temperature of each cylinder was recorded. The smaller the differences between the exhaust gas temperatures found, the smaller the amount of IDIDs formed. 5 The exhaust gas temperatures of the 4 cylinders ("Cl" to "C4") were measured at each of the cylinder outlets after 0 minutes ("*0") and after 5 minutes (".5"). The results of the exhaust gas temperature measurements with average values ("A") and the greatest differences from A in the downward ("-") and upward ("+") directions for the two test runs are summarized in the overview which follows. 10 II. Clean-up: The test was shortened to 8 hours; the CEC F-98-08 method was conducted without addition of Zn. However, 1 mg/L of Na in the form of sodium naphthenate and 20 mg/L 15 of dodecenylsuccinic acid, and also an inventive compound, were added in each case, and the engine power was determined. After the clean-up, the engine was cooled and restarted. The exhaust gas temperature of each cylinder was recorded. The smaller the differences between the exhaust gas 20 temperatures found, the smaller the amount of IDIDs formed. The exhaust gas temperatures of the 4 cylinders ("Cl" to "C4") were measured at each of the cylinder outlets after 0 minutes ("0") and after 5 minutes ("&5"). The results of the exhaust gas temperature measurements with average values ("A") and the greatest 25 differences from A in the downward ("-") and upward ("+") directions are summarized in the overview which follows. Dirty-up clean-up sequence 1: 30 Dirty-up: Significant deviations in exhaust gas temperatures were found during the test, and so it was stopped after 3 hours, in order to avoid engine damage. 35 After dirty-up: M/54171-PCT U I 00 Cl: 40*C C2: 35*C C3: 32*C C4: 480C -5 C1: 117'C C2:45*C C3:47*C C4:1090C A: 79.5*C (+37.50C / -32.5*C) 5 Significant deviations from the mean and significant differences between the individual cylinders show the presence of IDIDs. Clean-up: 10 After clean-up with 150 ppm of sample according to preparation example 1 in the presence of 1 mg/L of Na + 20 mg/L of dodecenylsuccinic acid: 00 C1:420C C2:42*C C3:290C C4: 340C 05 C1: 850C C2: 860C C3: 570C C4: 530C A: 70.30C (-17.3*C 15 /+15.70C) The deviation from the mean temperature of the exhaust gases is low, which suggests the removal of IDIDs. 20 The compounds described by the invention are very effective against the formation of IDIDs in direct injection engines, as can be seen by the example of the Peugeot DW10, which is used in the test in a similar manner to the CEC F-98-08 procedure, but in the presence of I mg/L of Na in the form of sodium naphthenate and 20 mg/L of dodecenylsuccinic acid. 25 Use example 10: DW1 0 Na power loss Test (clean up) To study the efficacy of the compounds of the invention against power loss, caused by metals such as Na, K, Ca and others (and not by Zn as described above), an IDID engine test as described above was used. During the dirty-up and clean-up run, the 30 performance is measured to CEC F-098-08, with a shortened clean-up period as described above. Power loss in the DU is calculated as follows: 35 Powerlossdu[%]= (1- P *du100 M/54171-PCT Power loss in the CU test is calculated as follows (negative number for power loss in the CU test means performance increase): 5 Powaass (DUIT)[%] = P Test Addition Power Power after Power before test, test, kW loss, % kW Dirty up, 8 hours, 1 mg/L of Na + 20 mg/L of 97.6 92.3 5.4 method as dodecenylsuccinic acid described above Clean up, 8 hours, I mg/L Na + 20 mg/L 91.6 93.0 -0.7 method as dodecenylsuccinic acid and described above 150 ppm of sample according to preparation example 1 10 The compounds described in this invention are effective against the formation of deposits which are caused by metals other than Zn, such as Na, K, Ca, as shown by the above Na power loss test. 15 Use example 11: Injector cleanliness (direct injection gasoline engine; DISI) a) Products used in the use tests that follow: Test 1: no additive (base run) Test 2: C16-dimethylamine+PIB-succinic acid +PO (preparation example 7), active 20 content 25 mg/kg Test 3: Tridecyldimethylamine+dodecenylsuccinic acid+PO (preparation example 15), active content 25 mg/kg M/54171 -PCT ow Test 4: Dimethylethanolamine/15PO+dodecenylsuccinic acid (preparation example 16), active content 25 mg/kg In all tests, European RON 92 E0 gasoline fuel was used. 5 b) The tests were conducted by the following method, originally described in US2013225463. Method: in-house BASF method Engine: turbocharged four-cylinder engine with capacity 1.6 liters Test duration: 60 hours 10 Test results: Test Change 2 ) in the FR value 1 ) Appearance of injector Test 1 (base run) + 4.54% Fig. 2A Test 2 -2.66% Fig. 2B Test 3 -1.90% Fig. 2C Test 4 -1.99% Fig. 2D 1): The FR value is a parameter detected by the engine management system, which correlates with the duration of the injection operation of the fuel into the combustion 15 chamber. The more marked the formation of deposits in the injector nozzles, the longer the injection time and the higher the FR value. Conversely, the FR value remains constant or has a slightly decreasing tendency when the injector nozzles remain free of deposits. 20 2): Change in the FR value in % compared to the FR value at the start of the test (the greater the positive values, the more deposits are formed in the injector and the greater the contamination of the injector) The results found demonstrate that the products described above in the inventive 25 examples are suitable for preventing the formation of deposits in injectors of direct injection gasoline engines and of removing deposits formed beforehand. The disclosure of the publications cited herein is explicitly incorporated by reference. M/54171-PCT

Claims (22)

1. The use of a reaction product comprising a quaternized nitrogen compound or of a fraction thereof which comprises a quaternized nitrogen compound and is 5 obtained from the reaction product by purification, said reaction product being obtainable by reacting a quaternizable nitrogen compound comprising at least one quaternizable, especially tertiary, amino group with a quaternizing agent which converts the at least one quaternizable, especially tertiary, amino group to a 10 quaternary ammonium group, the quaternizing agent being a hydrocarbyl epoxide in combination with a free hydrocarbyl-substituted polycarboxylic acid; as a fuel additive or lubricant additive or kerosene additive. 15

2. The use according to claim 1 as an additive for reducing the fuel consumption of direct injection diesel engines, especially of diesel engines with common rail injection systems, and/or for minimizing power loss in direct injection diesel engines, especially in diesel engines with common rail injection systems. 20

3. The use according to claim 1 as a gasoline fuel additive for reducing the level of deposits in the intake system of a gasoline engine, such as especially DISI and PFI (port fuel injector) engines.

4. The use according to claim 1 as a diesel fuel additive for reducing and/or 25 preventing deposits in the intake systems, such as especially the internal diesel injector deposits (IDIDs), and/or valve sticking in direct injection diesel engines, especially in common rail injection systems.

5. The use according to any of the preceding claims, wherein the quaternizable 30 nitrogen compound is selected from: a) at least one alkylamine of the following general formula 3 RaRbRcN (3) M/54171-PCT 91 in which at least one of the Ra, Rb and Re radicals is a straight-chain or branched, saturated or unsaturated C8-C 4 0-hydrocarbyl radical (especially straight-chain or 5 branched C 8 -C 4 o-alkyl) and the other radicals are identical or different, straight chain or branched, saturated or unsaturated 0 1 -C 6 -hydrocarbyl radicals (especially C-C 6 -alkyl); or in which all the Ra, Rb and R, radicals are identical or different, straight-chain or branched, saturated or unsaturated C8-C 4 o-hydrocarbyl radicals, especially 10 straight-chain or branched C8 - C 4 O-alkyl radicals; b) at least one polyalkene-substituted amine comprising at least one quaternizable, especially tertiary, amino group; c) at least one polyether-substituted amine comprising at least one quaternizable, especially tertiary, amino group; and 15 d) at least one reaction product of a hydrocarbyl-substituted acylating agent and a compound comprising a nitrogen or oxygen atom and additionally comprising at least one quaternizable amino group; and e) mixtures thereof. 20

6. The use according to any of claims 1 to 5, wherein the quaternizing agent comprises an epoxide of the general formula 4 d 41 1_(4) Rd Rd 25 where the Rd radicals present therein are the same or different and are each H or a hydrocarbyl radical, the hydrocarbyl radical being an aliphatic or aromatic radical having 1 to 10 carbon atoms. 30

7. The use according to any of the preceding claims, wherein the free acid of the quaternizing agent is a hydrocarbyl-substituted C3-C 28 -dicarboxylic acid. M/54171-PCT 92

8. The use according to any of the preceding claims, wherein the hydrocarbyl substituent of the carboxylic acid has a number-average molecular weight (Ma) of 85 to 20 000 or a polyalkylene radical having a degree of polymerization of 2 to 100, or3 to 50 or4to 25. 5

9. The use according to any of the preceding claims, wherein the quaternizable tertiary amine is a compound of the formula 3 in which at least two of the Ra, Rb and Re radicals are the same or different and are each a straight-chain or branched C 1 0-C2o-alkyl radical and the other radical is C 1 -C 4 -alkyl. 10

10. The use according to any of the preceding claims, wherein the quaternizing agent is selected from lower alkylene oxides in combination with a polyalkenyl substituted dicarboxylic acid. 15

11. The use according to any of the preceding claims, wherein the fuel is selected from diesel fuels, biodiesel fuels, gasoline fuels, and alkanol-containing gasoline fuels.

12. A quaternized nitrogen compound as defined in any of claims 1 to 10. 20

13. A process for preparing a quaternized nitrogen compound according to claim 12, comprising the reaction of a quaternizable nitrogen compound comprising at least one quaternizable tertiary amino group with a quaternizing agent which converts the at least one tertiary amino group to a quaternary ammonium group, 25 the quaternizing agent being a hydrocarbyl epoxide in combination with a free hydrocarbyl-substituted polycarboxylic acid.

14. An additive concentrate comprising, in combination with further diesel fuel additives or gasoline fuel additives or lubricant additives, at least one quaternized 30 nitrogen compound as defined in claim 12 or prepared according to claim 13.

15. A fuel composition or lubricant composition or kerosene composition comprising, in a majority of a customary fuel or lubricant, a proportion of at least one reaction M/54171-PCT 93 product comprising a quaternized nitrogen compound, or a fraction thereof which comprises a quaternized nitrogen compound and is obtained from the reaction product by purification, said reaction product being obtainable by reacting a quaternizable nitrogen compound comprising at least one 5 quaternizable tertiary amino group with a quaternizing agent which converts the at least one tertiary amino group to a quaternary ammonium group, the quaternizing agent being a hydrocarbyl epoxide in combination with a free hydrocarbyl-substituted polycarboxylic acid. 10

16. The fuel composition or lubricant composition according to claim 15, wherein the quaternizable compound is selected from a) at least one alkylamine comprises of the following general formula 3 RaRbRcN (3) 15 in which at least one of the Ra, Rb and Re radicals is a straight-chain or branched, saturated or unsaturated C 8 -C 40 -hydrocarbyl radical (especially straight-chain or branched C 8 -C 4 o-alkyl) and the other radicals are identical or different, straight 20 chain or branched, saturated or unsaturated Cl-C6-hydrocarbyl radicals (especially Cr 1 C 6 -alkyl); or in which all the Ra, Rb and Re radicals are identical or different, straight-chain or branched, saturated or unsaturated C8-C40-hydrocarbyl radicals, especially straight-chain or branched C 8 -C 40 -alkyl radicals; 25 b) at least one polyalkene-substituted amine comprising at least one quaternizable, especially tertiary, amino group; c) at least one polyether-substituted amine comprising at least one quaternizable, especially tertiary, amino group; and d) at least one reaction product of a hydrocarbyl-substituted acylating agent 30 and a compound comprising a nitrogen or oxygen atom and additionally comprising at least one quaternizable amino group; and e) mixtures thereof. M/54171-PCT 94

17. The fuel composition or lubricant composition according to either of claims 15 and 16, wherein the quaternizing agent comprises an epoxide of the general formula 4 5 d (4) Rd Rd where the Rd radicals present therein are the same or different and are each H or a 10 hydrocarbyl radical, the hydrocarbyl radical being an aliphatic or aromatic radical having 1 to 10 carbon atoms.

18. The fuel composition or lubricant composition according to any of claims 15 to 17, wherein the free acid of the quaternizing agent is a hydrocarbyl-substituted 15 C 3 -C 28 -dicarboxylic acid.

19. The fuel composition or lubricant composition according to any of claims 15 to 18, wherein the hydrocarbyl substituent of the carboxylic acid is a polyalkylene radical having a degree of polymerization of 2 to 100, or 3 to 50 or 4 to 25. 20

20. The fuel composition or lubricant composition according to any of claims 15 to 19, wherein the quaternizable tertiary amine is a compound of the formula 3 in which at least two of the Ra, Rb and Rc radicals are the same or different and are each a straight-chain or branched CIO-C 2 o-alkyl radical and the other radical is 25 C 1 -C 4 -alkyl.

21. The fuel composition or lubricant composition according to any of claims 15 to 20, wherein the quaternizing agent is selected from lower alkylene oxides in combination with a free hydrocarbyl-substituted polycarboxylic acid. 30 M/54171 -PCT 95

22. The fuel composition or lubricant composition according to any of the preceding claims 15 to 21, selected from diesel fuels, biodiesel fuels, gasoline fuels, and alkanol-containing gasoline fuels. M/54171-PCT